We look at the division of 79252925 by 921 
The aim is to understand the frequency of 921 in 79252925.

Let's proceed to step 1:
When dividing 7 by 921, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 921

Advancing to step 2:
921 goes into 79 0 times with a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Bring next digit (2) of the dividend behind the 79 and repeat the process: 792 / 921

Going ahead to step 3:
If we divide 792 by 921, we get 0 and a remainder of 792.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 792, we get 792.
Grab the next digit (5) from the dividend, add it to 792, then carry on: 7925 / 921

Advancing to step 4:
When dividing 7925 by 921, we get 8 with a remainder of 557.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 7368 from 7925, we get 557.
Take the next digit (2) from the dividend and append it to 557, then repeat: 5572 / 921

Let's proceed to step 5:
921 can be fit into 5572 6 times, resulting in a remainder of 46.
The next digit of our result is 6. 
Result so far: 86.0
Deduct 5526 from 5572 and we're left with 46.
Take the next digit (9) from the dividend and append it to 46, then repeat: 469 / 921

Going ahead to step 6:
921 goes into 469 0 times with a remainder of 469.
Write down 0 as next digit of the result. 
Result so far: 860.0
If we subtract 0 from 469, we get 469.
Include the next digit (2) from the dividend after 469, then repeat: 4692 / 921

Moving on to step 7:
If we divide 4692 by 921, we get 5 and a remainder of 87.
Use 5 as the next digit of our solution. 
Result so far: 8605.0
Deduct 4605 from 4692 and we're left with 87.
Take the next digit (5) from the dividend and append it to 87, then repeat: 875 / 921

Going ahead to step 8:
When dividing 875 by 921, we get 0 with a remainder of 875.
The next digit of our result is 0. 
Result so far: 86050.0
Subtracting 0 from 875 leaves us with 875.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8750, and continue the process.

Going ahead to step 9:
8750 divided by 921 is 9 with a remainder of 461.
Use 9 as the next digit of our solution. 
Result so far: 86050.9
Subtracting 8289 from 8750 leaves us with 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

Advancing to step 10:
921 can be fit into 4610 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 86050.95
The remainder is 5 after subtracting 4605 from 4610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 11:
If we divide 50 by 921, we get 0 and a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 86050.95
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 12:
The number 921 fits into 500 0 times, leaving a remainder of 500.
Use 0 as the next digit of our solution. 
Result so far: 86050.95
The remainder is 500 after subtracting 0 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

The final outcome is 86050.95, with a leftover of 0.005.