quick campsite question!

for those of you who have moved in villagers using amiibo cards i was wondering: i know that you need to scan the card 3 times and complete their requests before they move in, but does it need to be 3 consecutive days? for example, if i scanned my card today and tomorrow, went through the process etc. and then didnt scan again for the 3rd time until a week from now would that count as summon #3, or reset the counter? hoping to figure out if i can keep a camper "in reserve" for when an unwanted villager moves out given the current glitches surrounding forced evictions via amiibo. thanks!