How to add high volume pushups to workout?

About 10 years ago I got onboard some plan, can’t remember what it was, that recommended an extremely high volume of pushups, hundreds per day where I’d do a set of 20-30 pushups every hour for my entire waking day.

I ended up feeling as strong, if not stronger than I’d ever felt, doing this, but eventually all of the soft tissues and tendons in my elbows and triceps basically exploded and I couldn’t sustain it so I stopped and went back to a more traditional lifting model that I’m on now.

I’d like to figure out a way to add these back into my workout at a slightly reduced rate but still getting some added benefits of the volume. I wouldn’t do it every single day, that wrecked me and wasn’t sustainable, but I’m thinking doing it 2-3 days per week.

I lift MTThF, and I do upper M/Th and lower T/F. I workout first thing in the morning, and I’m wondering whether I add the pushups the same day that I do bench (bench first thing in the morning and then pushups throughout that day) or whether I do them the following day.

So I’m wondering if I should do:

M - Upper (bench) + pushups
T - Lower
W - Off
Th - Upper (bench) + pushups
F - Lower
Sat - Pushups
Sun - Off

Or whether I should do:

M - Upper (bench)
T - Lower + pushups
W - Off
Th - Upper (bench)
F - Lower + pushups
Sat - Off
Sun - Pushups