There is no such requirement. For the purposes of Canadian citizenship, as long as you have lived for a total of 1095 days over the last 5 years, you meet the time requirement.
For example, if for the last 5 years you spent 2 years outside of Canada, and 3 years in Canada, you'll still meet the time requirement.
Note: it's highly recommended to have lived in Canada for more than 3 years at the moment you apply for citizenship.