Some rituals require that you make a gesture seven times - for example, shuffle the Tarot seven times - but I think this "seven" is not a specific count of occurrences, rather a symbol, denoting
until you get bored with counting and start to count ahead in your head and then realize that you're counting ahead and subtracting 2 or 3 counts in hopes of coming close to the actual number signifying the incidents of the act, thereby realizing that you have no idea of either the number you have counted or how many times you have iterated the act.
Once you know what it feels like it is easier than understanding this.