Someone should go down the list and count each and every attack that hit him (you don't need to include Kidds) cause I'm interested to see the #.
This is the best I could do lol.
Attacks that Kaido received
1. Stabbed by Kin'emon
2. Stabbed in the hand by Kiku
3. Attacked by Neko who used Crimson Cat Dance
4. Attacked by Kawamatsu who used Kappa Style River of Sea
5. Stabbed by Inu who used Canine Scourge
6. Attacked by Kiku who used Fallen Snow Scythes Slicing Rounds
7. Shot by Izo
8. Counter Attacked by Raizo who used his blast breath against him
9. Kin'emon, Ashura Doji, and Inu all attacked him at the same time using Oden Two Sword Style Paradise Totsuka
10. Stabbed by Denjiro
11. Punched by Luffy who used Red Roc
12. Attacked by Zoro and Killer who both used Three Sword Style Purgatory Oni Giri and Be-Heading Claws
13. Punched by Luffy who used Kong Gun
14. Attacked by Law who used Takt by having a bunch of rocks fall on him
15. Attacked by Kid who used Punk Vise
16. Attacked by Luffy who used Kong Rifle
17. Attacked by Kid who used Slam Gibson
18. Stabbed by Law who used Gamma Knife
19. Attacked by Killer who used Scyther Sonic
20. Attacked by Luffy who used Rhino Schneider
21. Attacked by Luffy who used Kong Gatling
22. Attacked by Zoro who used Black Rope Dragon Twister
23. Stabbed by Law who used Injection Shot
24. Attacked by Zoro who used Dead Man's Game
25. Attacked by Luffy who used advanced CoC
26. Attacked again by Luffy who used advanced CoC
27. Stabbed by Kin'emon
28. Attacked by Yamato who used Hallowed Glacier Slash
29. Attacked by both Luffy and Yamato who both used Jet Culverin and White Serpent
30. Bitten by Momo
31. Attacked by Luffy
32. Punched by Luffy who used Roc Gun
33. Kicked by Luffy
34. Hit by Luffy's Roc Gatling
35. Kicked by Luffy
36. Attacked by Luffy who used Hydra
37. Mangaed to stop one of Luffy's attack but then receives three more punches from Luffy
38. Attacked even more by Luffy
39. Punched in the face by Luffy
40. Luffy hits Kaido's jaw using Over Kong Gun