525058 divided by 25 
The aim is to understand the frequency of 25 in 525058.

Step 1:
When dividing 5 by 25, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 25

On to step 2:
When dividing 52 by 25, we get 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 50 from 52, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 25

On to step 3:
If we divide 25 by 25, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 21.0
If we subtract 25 from 25, we get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 25

Moving on to step 4:
0 divided by 25 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 210.0
Subtracting 0 from 0 leaves us with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 25

Step 5:
25 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 2100.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 25

Moving on to step 6:
25 can be fit into 58 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 21002.0
Subtracting 50 from 58 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
25 can be fit into 80 3 times, resulting in a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 21002.3
Deduct 75 from 80 and we're left with 5.
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 8:
50 divided by 25 is 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 21002.32
If we subtract 50 from 50, we 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.

Moving on to step 9:
25 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21002.32
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.

Going ahead to step 10:
25 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 21002.32
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.

The quotient of the division is 21002.32, and the remainder is 0.0.