That's a very, very, very variable factor here, I really had dificulties chosing a vote.
Voted three days at week but could as well be three times a day or three times a month.
Before girlfriends, wifes and kids, etc., i.e. for me during the 80ies and 90ies, I think at least five of the weeks seven days a week for "sim" racing, besides bike riding and rowing on a semi-skilled level.
If I was 20-30 years younger, it would definately be five-six days a week. Just for my present offline racing content I have for several lives.
Three weeks ago I re-opened my iRacing account after ten years of hibernation (or rather opened a new one) as well as well as I begun ACC CP and rF2 online racing during late spring this year.
But more and more realizing that you have to set aside time for training too, doing online racing on a more serious competition level. And quite often that part does not merge into a higher entity with a family life and other interests, I'm afraid.
And now remember why I left Formula Simracing online simracing league back in 2003, settling for offline racing. Here GTR2 'save' button is a major advantage, e.g. participating in a 24 hour series setup by your own. Yes, had a Le Mans offline GTR2 competition with +90 cars lasting two weeks
But yes, I think three times a week now is a very rough estimate, varying a lot. In the time I'm writing this post, I haven't raced for 11 days, but knowing I'll be racing the next couple of days consecusively, maybe even four days straight, if I'm very lucky.
So yes for online racing in iRacing, ACC CP and rF2 I'm typically the one just bumping in for short practise and qual in unfamilar car/track before race, improving my driving during the race. Helps me in semi endurance series, i.e. 45-80 mins or so, and I have fun with it, so it's OK for me
I've long time accepted that I don't have the practise time for being a top driver.
Edit: I count every second as 'racing' right from I click the startup button for a sim game, nomatter if it's practice, offline AI racing, online racing or just cruising (I've done that part a lot the in AC classic mods the later years, just to get the road feeling of driving exceptional classic cars), since I know it's my family and friends counting method