Scale back default cron execution frequency.
Scale back default cron execution frequency.

Associated documentation and suggested min/max ranges included.

This change aims to help with smaller and free quota deployments.

NOTE: larger deployments may wish to revert to original frequencies.

sillywilly42/simian,googlearchive/simian,frlen/simian,frlen/simian,googlearchive/simian,googlearchive/simian,sillywilly42/simian,googlearchive/simian,selfcommit/simian,selfcommit/simian,frlen/simian,selfcommit/simian,frlen/simian,sillywilly42/simian,selfcommit/simian,sillywilly42/simian