How to assign zero numbers when generate randint?

I want to generate random numbers like

import random
import numpy as np
a=np.random.randint(8,size=(5,126))

What I want is when a list generates 126 random numbers between 0 to 7, assign 0 count as I want. For example, maybe this code generates 630 random numbers. I want to have 5 rows with 590 count zero, and 40 count one to seven in 630 random numbers.

How could I do this?