There's 104 Visual Premonitions, across all 8 seasons (including the unaired Pilot), of the show.
91/104 are Alyssa Milano's Phoebe.
4/104 are Ronny's (from S7E11 "Ordinary Witches")
2/104 are Prue's (from S1E21 "Love Hurts")
1/104 are Lori Rom's Phoebe.
1/104 are Matthew Tate's (from S1E9 "The Witch is Back")
1/104 are Cryto's (from S2E17 "How to Make a Quilt Out of Americans")
1/104 are Dr. Curtis Williamson's (from S2E20 "Astral Monkey")
1/104 are the Seer's (from S4E13 "Charmed & Dangerous")
1/104 are Mitzy's (from S6E4 "The Power of Three Blondes")
1/104 are Odin's (from S7E10 "Witchness Protection")
And then Phoebe has 3 off-screen premonitions, 7 non-visual premonitions and 1 psychic echo premontion, across all 8 seasons (including the unaired Pilot), of the show.
Off-Screen Premonitions
1. S3E12 "Wrestling with Demons"
2. S3E22 "All Hell Breaks Loose"
3. S6E19 "Crimes & Witch Demeanors"
Non-Visual Premonitions
S1E0 "Unaired Pilot"
S1E4 "Dead Man Dating" x2
S3E18 "Sin Francisco"
S5E17 "Lucky Charmed" x2
S5E22 "Oh My Goddess, Pt 1"
Psychic Echo Premonition
S3E14 "The Good, the Bad & the Cursed"
Phoebe total premonition count with all of this mind (minus the unaired Pilot): 100
S1 = 36 (2/36 Non-Visual)
S2 = 14
S3 = 15 (2/15 Off-Screen, 1/15 Non-Visual & 1/15 Psychic Echo)
S4 = 10
S5 = 12 (3/12 Non-Visual)
S6 = 4 (1/4 Off-Screen)
S7 = 6
S8 = 3
(2/6 Non-Visual) S1E4 "Dead Man Dating" x6
S5E8 "Witch in Time" x4
S1E2 "I've Got You Under My Skin" x3
S1E3 "Thank You For Not Morphing" x3
S1E8 "The Truth is Out There...and it Hurts" x3
(1/3 Psychic Echo) S3E14 "The Good, the Bad & the Cursed" x3
S5E6 "The Eyes Have it" x3
S1E1 "Something Wicca This Way Comes" x2
S1E9 "The Witch is Back" x2
S1E11 "Feats of Clay" x2
S1E12 "The Wendigo" x2
S1E15 "Is There a Woogy, in the House?" x2
S1E16 "Which Prue is it, Anyway?" x2
S1E20 "The Power of Two" x2
S1E22 "Deja Vu all Over, Again" x2
S2E2 "Morality Bites" x2
(Non-Visual) S5E17 "Lucky Charmed" x2
S7E10 "Witchness Protection" x2
S7E13 "Charmageddon" x2
S1E6 "The Wedding from Hell" x1
S1E7 "The Fourth Sister" x1
S1E13 "From Fear to Eternity" x1
S1E18 "When Bad Warlocks Go Good" x1
S1E19 "Out of Sight" x1
S2E1 "Witch Trial" x1
S2E5 "She's a Man, Baby, a Man!" x1
S2E7 "They're Everywhere" x1
S2E8 "P3 H20" x1
S2E11 "Reckless Abandon" x1
S2E13 "Animal Pragmatism" x1
S2E15 "Give Me a Sign" x1
S2E16 "Murphy's Luck" x1
S2E19 "Ex Libris" x1
S2E20 "Astral Monkey" x1
S2E21 "Apocalypse, Not" x1
S2E22 "Be Careful What You Witch For" x1
S3E1 "The Honeymoon's Over" x1
S3E2 "Magic Hour" x1
S3E5 "Sight Unseen" x1
S3E6 "Primrose Empath" x1
S3E9 "Coyote Piper" x1
S3E10 "We all Scream for Ice Cream" x1
S3E11 "Blinded by the Whiteligher" x1
(Off-Screen) S3E12 "Wrestling with Demons" x1
S3E16 "Death Takes a Halliwell" x1
(Non-Visual) S3E18 "Sin Francisco" x1
S3E21 "Look Who's Barking" x1
(Off-Screen) S3E22 "All Hell Breaks Loose" x1
S4E1 "Charmed Again, Pt 1" x1
S4E5 "Size Matters" x1
S4E7 "Brain Drain" x1
S4E8 "Black as Cole" x1
S4E11 "Trial by Magic" x1
S4E13 "Charmed & Dangerous" x1
S4E16 "The Fifth Halliwheel" x1
S4E19 "We're off to See the Wizard" x1
S4E20 "Long Live the Queen" x1
S4E21 "Womb Raider" x1
S5E14 "Sand Francisco "Dreamin'" x1
S5E16 "Baby's First Demon" x1
(Non-Visual) S5E22 "Oh My Goddess, Pt 1" x1
S6E3 "Forget Me, Not" x1
S6E13 "Used Karma" x1
S6E15 "I Dream of Phoebe" x1
(Off-Screen) S6E19 "Crimes & Witch Demeanors" x1
S7E5 "Styx Feet Under" x1
S7E8 "Charmed Noir" x1
S8E1 "Still Charmed & Kicking" x1
S8E3 "Run, Piper, Run" x1
S8E9 "Hulkus Pocus" x1