For your age excessive Urination could be due to
1.Drinking lot of water/ excess tea/ coffee/alcohol
2.Urinary Tract/bladder infection
3. Bladder stone causing a blockage in ureter/bladder, stone in urinary tract, cystitis, interstitial nephritis
5.Diabetes mellitus/Diabetes inspidus, Hypertension,
6. stress/Anxiety/nervousness ,
7.Do urine Re/Me, Blood sugar testing,Take USG KUB, and consult urologist for advice