tell me it's enough please

Me and my husband are TTC for almost a year! We've beentrough all tests possible and thank god all good with us. The "problem" is we only manage to do it twice a week, sometimes 3 times but most weeks only 2. From many different reasons that can't be changed at the moment. I know it takes only 1 time to conceive but because it hasn't appen I need support ! Please tell me twice a week it's ok and enough 😿☹️💕