i had a daily habit. to my husband, it would look like maybe three times a week, but he had no idea i would go out and buy white wine behind his back (my usual is red wine, but i get stains on my lips, so he would know).
my reasoning to hide it was it'd cheaper that way. if he saw me drinking, he would buy his $10 six pack, which would turn into a second 6-pack before midnight. my wine was usually $3 a bottle, so i felt like he was throwing away so much money because of me. it made me feel horrible, so i would just sneak it. he only started finding out after finding my wine bottles hidden everywhere.
tldr; truly a daily habit, but other people saw it as 2 or 3x a week.