What other symptoms are present and what were the initial diagnostic tests done?
Urinary frequency may indeed be due to infection as well as other conditions such as prostate issues, interstitial cystitis, overactive bladder syndrome, ans even neurological issues. If it has been 8 years already, further evaluation and additional diagnostic tests may need to be done including Cystometry, Cystoscopy, neurological tests, ultrasound as well as urine tests.