We look at the division of 922621 by 25 
The aim is to understand the frequency of 25 in 922621.

Going ahead to step 1:
The number 25 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 25

On to step 2:
If we divide 92 by 25, we get 3 and a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 75 from 92 to get 17.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 25

On to step 3:
25 goes into 172 6 times with a remainder of 22.
Put 6 as the next digit of the answer. 
Result so far: 36.0
Subtract 150 from 172 to get 22.
Include the next digit (6) from the dividend after 22, then repeat: 226 / 25

Let's proceed to step 4:
The number 25 fits into 226 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 369.0
The remainder is 1 after subtracting 225 from 226.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 25

Step 5:
When dividing 12 by 25, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 3690.0
Subtract 0 from 12 to get 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 25

Advancing to step 6:
25 goes into 121 4 times with a remainder of 21.
Record the quotient 4 as the next digit in the result. 
Result so far: 36904.0
Subtract 100 from 121 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
If we divide 210 by 25, we get 8 and a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 36904.8
The remainder is 10 after subtracting 200 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
When dividing 100 by 25, we get 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 36904.84
Subtracting 100 from 100 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.

Step 9:
When dividing 0 by 25, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 36904.84
If we take 0 away from 0, we end up 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.

Let's proceed to step 10:
25 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 36904.84
Deduct 0 from 0 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.

The quotient of the division is 36904.84, and the remainder is 0.0.