The default is 30 boots. Unless there is an over riding reason to change it, I wouldn't.
But if you must.
A value of "0" for the check interval disables the checks. Something like "sudo tune2fs -c 0 /dev/sdx" should disable checks based on mount counts; then it is a matter of "sudo tune2fs -i 1m /dev/sdx" to check /dev/sdx each month.
Insanity: Doing the same thing over and over and each time expecting a different result.
Democracy is 2 wolves and a lamb voting on the menu. Liberty is an armed lamb protesting the electoral outcome. A Republic negates the need for an armed protest.