We divide 553961 by 25
The aim is to understand the frequency of 25 in 553961.

On to step 1:
When dividing 5 by 25, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 25

Let's proceed to step 2:
55 divided by 25 is 2 with a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 5 after subtracting 50 from 55.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 25

Advancing to step 3:
The number 25 fits into 53 2 times, leaving a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 22.0
The remainder is 3 after subtracting 50 from 53.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 25

Moving on to step 4:
If we divide 39 by 25, we get 1 and a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 221.0
Deduct 25 from 39 and we're left with 14.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 25

Moving on to step 5:
The number 25 fits into 146 5 times, leaving a remainder of 21.
The number 5 becomes the next digit in our result. 
Result so far: 2215.0
Deduct 125 from 146 and we're left with 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 25

Let's proceed to step 6:
25 goes into 211 8 times with a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 22158.0
Deduct 200 from 211 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
25 can be fit into 110 4 times, resulting in a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 22158.4
Subtracting 100 from 110 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
25 can be fit into 100 4 times, resulting in a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 22158.44
Subtract 100 from 100 to get 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 22158.44, and the remainder is 0.0.