My first task after finishing work each day is to feed my cat, Collette. That's my modus operandi.
If Collette feels like I'm not giving her my undivided attention, she'll bite my feet. That's her modus operandi.
When I eat a meal, Collette jumps on the table and attempts to eat some of my food. I move the food away from her and put her back down on the floor. That's our shared modus operandi.
On second thought, these are just our ways of doing things. There's no need for Latin.
