UK here - 1 or 2 a week on my home phone which we never use and not many people have the number anyway. I have BT's 'Call Protect' which is supposed to let you block nuisance calls but it's such a pain to use - takes too many clicks and menu changes. On Android I just select last number and block.
Hardly any spam calls on mobile as built in software (forget the name) on my S23 automatically warns me of possible spam or blocks them completely.

Much better than it was 10 years ago - that was a nightmare.