We're dividing 81625 by 87 
The aim is to understand the frequency of 87 in 81625.

Step 1:
If we divide 8 by 87, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 87

Going ahead to step 2:
If we divide 81 by 87, we get 0 and a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Bring next digit (6) of the dividend behind the 81 and repeat the process: 816 / 87

Advancing to step 3:
87 can be fit into 816 9 times, resulting in a remainder of 33.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 783 from 816 and we're left with 33.
Append the next digit (2) from the dividend to 33 and continue with: 332 / 87

Moving on to step 4:
332 divided by 87 is 3 with a remainder of 71.
Put 3 as the next digit of the answer. 
Result so far: 93.0
Deduct 261 from 332 and we're left with 71.
Grab the next digit (5) from the dividend, add it to 71, then carry on: 715 / 87

Going ahead to step 5:
When dividing 715 by 87, we get 8 with a remainder of 19.
The next digit of our result is 8. 
Result so far: 938.0
If we subtract 696 from 715, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 6:
190 divided by 87 is 2 with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 938.2
The remainder is 16 after subtracting 174 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 7:
87 goes into 160 1 times with a remainder of 73.
The number 1 becomes the next digit in our result. 
Result so far: 938.21
Subtract 87 from 160 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 8:
87 can be fit into 730 8 times, resulting in a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 938.218
The remainder is 34 after subtracting 696 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 9:
If we divide 340 by 87, we get 3 and a remainder of 79.
The next digit of our result is 3. 
Result so far: 938.2183
The remainder is 79 after subtracting 261 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 10:
87 goes into 790 9 times with a remainder of 7.
The next digit of our result is 9. 
Result so far: 938.21839
If we take 783 away from 790, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 11:
The number 87 fits into 70 0 times, leaving a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 938.21839
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 12:
700 divided by 87 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 938.2183908
Subtract 696 from 700 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
40 divided by 87 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 938.2183908
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 938.2183908, with a leftover of 4e-08.