ecookie,
just do when you are free, no need to be so strict one, i also never ask my maid to do when i work, this activity is between me and myra only. but after i got my first poop, my HB was very impressed, he also now trying to catch. very happy leh when get to catch, like strike goal like that.
for me i wait for myra to signal with her face or her body tense, then i suspect she want to poop, i put her in potty, if not, then life is like normal, no need to be on standby like that. can try lor when you buy the potty. sometimes i never catch for a few days cos myra never poop when i am at home.