877136 ÷ 87 
The aim is to understand the frequency of 87 in 877136.

On to step 1:
When dividing 8 by 87, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 87

Going ahead to step 2:
If we divide 87 by 87, we get 1 and a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 87 away from 87, we end up with 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 87

Going ahead to step 3:
87 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 87

Going ahead to step 4:
If we divide 71 by 87, we get 0 and a remainder of 71.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we take 0 away from 71, we end up with 71.
Fetch the next digit (3) from the dividend, attach it to 71 and continue: 713 / 87

Moving on to step 5:
When dividing 713 by 87, we get 8 with a remainder of 17.
Write down 8 as next digit of the result. 
Result so far: 1008.0
If we subtract 696 from 713, we get 17.
Include the next digit (6) from the dividend after 17, then repeat: 176 / 87

Let's proceed to step 6:
87 can be fit into 176 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 10082.0
If we subtract 174 from 176, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
87 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 10082.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
87 goes into 200 2 times with a remainder of 26.
The next digit of our result is 2. 
Result so far: 10082.02
Subtracting 174 from 200 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 9:
87 can be fit into 260 2 times, resulting in a remainder of 86.
Put 2 as the next digit of the answer. 
Result so far: 10082.022
If we subtract 174 from 260, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

After the division, we end up with 10082.022 and a remainder of 0.0086.