138089 ÷ 25 
The aim is to understand the frequency of 25 in 138089.

Going ahead to step 1:
1 divided by 25 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 25

Step 2:
When dividing 13 by 25, we get 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 25

Moving on to step 3:
When dividing 138 by 25, we get 5 with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 125 away from 138, we end up with 13.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 25

Advancing to step 4:
If we divide 130 by 25, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 55.0
Subtract 125 from 130 to get 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 25

Advancing to step 5:
25 can be fit into 58 2 times, resulting in a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 552.0
The remainder is 8 after subtracting 50 from 58.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 25

Step 6:
89 divided by 25 is 3 with a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 5523.0
The remainder is 14 after subtracting 75 from 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
25 goes into 140 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 5523.5
Subtract 125 from 140 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
The number 25 fits into 150 6 times, leaving a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 5523.56
The remainder is 0 after subtracting 150 from 150.
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:
0 divided by 25 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 5523.56
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.

Step 10:
When dividing 0 by 25, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5523.56
Subtract 0 from 0 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.

After the division, we end up with 5523.56 and a remainder of 0.0.