We're dividing 644784 by 76 
The aim is to understand the frequency of 76 in 644784.

Going ahead to step 1:
6 divided by 76 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 76

Advancing to step 2:
When dividing 64 by 76, we get 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Fetch the next digit (4) from the dividend, attach it to 64 and continue: 644 / 76

Moving on to step 3:
644 divided by 76 is 8 with a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 608 from 644 to get 36.
Take the next digit (7) from the dividend and append it to 36, then repeat: 367 / 76

Let's proceed to step 4:
76 can be fit into 367 4 times, resulting in a remainder of 63.
The number 4 becomes the next digit in our result. 
Result so far: 84.0
The remainder is 63 after subtracting 304 from 367.
Append the next digit (8) from the dividend to 63 and continue with: 638 / 76

On to step 5:
76 can be fit into 638 8 times, resulting in a remainder of 30.
Write down 8 as next digit of the result. 
Result so far: 848.0
Subtract 608 from 638 to get 30.
Append the next digit (4) from the dividend to 30 and continue with: 304 / 76

Advancing to step 6:
When dividing 304 by 76, we get 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 8484.0
Deduct 304 from 304 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
When dividing 0 by 76, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8484.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
If we divide 0 by 76, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8484.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 8484.0, and the remainder is 0.0.