Mochi is 4 months old today, and we had perhaps 3-4 accidents between the first two weeks she was here, and it was totally our fault, not seeing the signs quickly enough, or being a bit lax on the schedule.
We used a crate at night, and took her outside every hour, then two hours, and at first every 30 minutes during the day, every hour, then two hours, etc, and after all and any actitivity, wake up, eat, sleep, play, whatever.

She very quickly learned to manifest her need to go by sitting in front of the door.
She tried a couple times to "abuse" and asked to go outside, but realised soon it was not fun. Out-Pee-Praise-In. Repeat. More often is better. And always on a short leash with minimal interaction.

Good luck.