TweetAgreed with above. Once a week is probably okay but compound movements are the biggest thing for growth, at least for me. I recently switched mine up and now doing:
Chest/bi
Back/tri
Shoulders
Legs

Core everyday. By flipping bi and tri I found I've been able to work those groups harder than if I'm already burning them as ancillary muscles.

Good luck!

Sent from my Pixel 3 using Fitnessgeared mobile app