How often do u find virus on your computer?
except fom the daily dose of samples i download… never 
at least i cant remeber the last time, must be when i had W98. I think i had a mothly reinstall on that machine ;D
In all honesty I can’t see the purpose of this question.
There is no consistency in peoples systems, browsers they use, where they stick their noses (security habits) and what measures they take to prevent said infections.
I haven’t found a virus on my system in over seven years since I made the switch to avast. Not that I expect to find any ;D
Just once, in the late 80ies.