For the EF era it's a very hard count, because if we count (as canon does) also film bodies, well that would be a problem ahah! And being a person that likes to buy used and resell pretty easily, also the lens count since 1999 (my birth year in Canon) is astronomic!
Let's see...if I remember correctly it's 4 film bodies and...10 I think? At least ten DSLR's, plus a single M body, the M6II (but may have been a couple more DSLR in the mix). So 15 bodies min.
Lenses....OMG that's brutal ahahah of course i started with the 28-90 and 75-300 kit I got together with the Eos 300 for my 1999 birthday.
From there...I can recall 34 Canon EF&EF-S lenses and 2 Canon EF-M lenses, and...at least 9 third party lenses, soooo not less then 45 lenses (but I would say closer to 50, I surely forgot something).
45 lenses for 15 bodies is 3 lenses per body, I would have thought more!
Then just RF I have two bodies now (but I'm in the process to sell the R10, and the 6D, to buy an RP, so they'll became 3 R bodies owned overall) and I had three lenses (just sold the 85 f2 and I'm now selling the 16 f2.8 so I'll remain with just the 35 f1.8), so 1,5 lenses per body today, but when RP comes I'll have a 1:1 coefficient on just R stuff.