While digging through recession data for Canada I stumbled on this tip-bit: if you sort the number of days between recession dates in ascending order you will find the following quadratic function.

The longest number of days between recessions was 6027 days ( ~16.5 years) while the shortest was 365 days or just 1 year.

On average Canada experiences a recession every 2315 days or 6 years and 4 months (estimated using a non-parametric regression). The last recession ended exactly 3416 days ago. Enough said.