210691 divided by 87 
The aim is to understand the frequency of 87 in 210691.

Step 1:
The number 87 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 87

Moving on to step 2:
87 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 87

Step 3:
The number 87 fits into 210 2 times, leaving a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 36 after subtracting 174 from 210.
Fetch the next digit (6) from the dividend, attach it to 36 and continue: 366 / 87

Going ahead to step 4:
87 can be fit into 366 4 times, resulting in a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 24.0
Subtracting 348 from 366 leaves us with 18.
Include the next digit (9) from the dividend after 18, then repeat: 189 / 87

Moving on to step 5:
The number 87 fits into 189 2 times, leaving a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 242.0
The remainder is 15 after subtracting 174 from 189.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 87

Going ahead to step 6:
87 can be fit into 151 1 times, resulting in a remainder of 64.
Write down 1 as next digit of the result. 
Result so far: 2421.0
If we take 87 away from 151, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 7:
640 divided by 87 is 7 with a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 2421.7
If we take 609 away from 640, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 8:
The number 87 fits into 310 3 times, leaving a remainder of 49.
Use 3 as the next digit of our solution. 
Result so far: 2421.73
If we take 261 away from 310, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 9:
490 divided by 87 is 5 with a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 2421.735
Subtracting 435 from 490 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 10:
When dividing 550 by 87, we get 6 with a remainder of 28.
Record the quotient 6 as the next digit in the result. 
Result so far: 2421.7356
Deduct 522 from 550 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 11:
280 divided by 87 is 3 with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 2421.73563
The remainder is 19 after subtracting 261 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 12:
When dividing 190 by 87, we get 2 with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 2421.735632
If we subtract 174 from 190, we get 16.
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 13:
160 divided by 87 is 1 with a remainder of 73.
Put 1 as the next digit of the answer. 
Result so far: 2421.7356321
If we take 87 away from 160, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 14:
If we divide 730 by 87, we get 8 and a remainder of 34.
Write down 8 as next digit of the result. 
Result so far: 2421.73563218
If we subtract 696 from 730, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

After the division, we end up with 2421.73563218 and a remainder of 3.4e-08.