We divide 665560 by 87
The aim is to understand the frequency of 87 in 665560.

On to step 1:
6 divided by 87 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 87

Advancing to step 2:
87 can be fit into 66 0 times, resulting in a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Append the next digit (5) from the dividend to 66 and continue with: 665 / 87

Going ahead to step 3:
665 divided by 87 is 7 with a remainder of 56.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 609 from 665, we get 56.
Include the next digit (5) from the dividend after 56, then repeat: 565 / 87

Step 4:
When dividing 565 by 87, we get 6 with a remainder of 43.
Write down 6 as next digit of the result. 
Result so far: 76.0
Subtracting 522 from 565 leaves us with 43.
Bring next digit (6) of the dividend behind the 43 and repeat the process: 436 / 87

Moving on to step 5:
87 goes into 436 5 times with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 765.0
The remainder is 1 after subtracting 435 from 436.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 87

Step 6:
The number 87 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 7650.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
87 can be fit into 100 1 times, resulting in a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 7650.1
Deduct 87 from 100 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 8:
When dividing 130 by 87, we get 1 with a remainder of 43.
Write down 1 as next digit of the result. 
Result so far: 7650.11
The remainder is 43 after subtracting 87 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final result is 7650.11 with a remainder of 0.043.