be in the habit of

Pratt-Heavner points out that "really big school districts struggle to find local growers who can actually meet their demand and meet it consistently; your local farmer may only be able to provide enough asparagus for a quarter of the students you serve and you don't want to be in the habit of only offering this fresh local produce to a select few elementary schools."

You don’t seem to be in the habit of treating your neighbors as your inferiors.

“You are a very strange creature by way of a friend!—always wanting me to play and sing before anybody and everybody! If my vanity had taken a musical turn, you would have been invaluable; but as it is, I would really rather not sit down before those who must be in the habit of hearing the very best performers.”

When stay-at-home orders are eventually relaxed, “by then people will already be in the habit of wearing face coverings,” Colfax said.

She hopefully has no reason to worry about the former among her peers, but she cannot be in the habit of correcting strangers, because it might simply not be safe.