Depending on the state you live in, you can order your own bloods and pay in cash. Ive been doing this for years, at this point my doctor just takes my word for it when I message him letting him know something is off and asking for a dose alteration on xyz prescription.
Take the guessing out of it, take the appointments out of it, take the stress out of it. Why wait 3 months to find out your estrogen is sky high or tanked? Quality of life is too important.
As others have mentioned, once a week minimum. A lot of TRT forums guys are moving to ED/EOD injections of their Tesosterone, regardless of ester. I personally am on Test Phenyl Prop M/W/F for my TRT and love it. Though I cant get away with subq with any prop esters like I can Test E or Test C.