It depends, How many polyps are and if BX of the polyps turn out to be cancerous or hyperplasia (hyperplastic).
Fecal occult blood test (FOBT) every year
In general population recommendations are start colonoscopy at 50 years of age then repeat every 10 years if its normal ( no polyps or small in size less the 3).
1 polyp Less then 10mm in rectum and sigmoid--check every 10 year
more then 3-10 polyps--every 5-10 years,
Sessile 3 or more polyps more than 10mm in size, tubular adenomas with low-grade dysplasia--every 5 years
3 to 10 adenomas, or a large (1 cm +) adenoma, or any adenomas with high-grade dysplasia or villous features--3 years after the polyps are removed
Serrated polyposis syndrome--do every year
If have family history of colon cancer less the 60 years of age then also do every 3-5 years years, and start colonoscopy in that case earlier at the age of 40 years
personal history of inflammatory bowel disease (ulcerative colitis or Crohn's disease) --colonoscopy start early depend when have pacolitis attack, the repeat colonoscopy every year with bx
Familial adenomatous polyposis (FAP) diagnosed by genetic testing, or suspected FAP without genetic testing=--colonoscopy start at 10-12 years of age
Hereditary non-polyposis colon
cancer (HNPCC), or at increased risk of HNPCC based on family history without genetic testing -colonoscopy start at the Age 20 to 25 years, or 10 years before the youngest case in the immediate family