I just calculated that in Wano, so from chapter 909 to 1013, Kaido appeared in 39 chapters and Big Mom appeared in 37 chapters. It is interesting to specify that just before Oden flashback (959), Kaido had appeared 9 chapters/51 and Big Mom 14 chapters/51.
For now, Kaido appears in 5% more chapters than Big Mom.
In the french board game "One Piece Adventure Island" Kaido, Whitebeard, Big Mom, Dragon and Sengoku have equal stats and better stats than Mihawk, Blackbeard and Admirals. Do what you want with this information lol.
Even tho I acknowledge Prime Garp's strength ( at the very very least top 6/7 of all time ) because of his portrayal, am I the only one who can't see him fight him a Top Tier ?? No weapons and no DF ! Like imagining him fighting with Big Mom or I don't know Akainu ( because a lot of you guys like Akainu ;) ) is so weird for me.