We look at the division of 961823 by 87 
The aim is to understand the frequency of 87 in 961823.

Going ahead to step 1:
The number 87 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (6) from the dividend to 9 and continue with: 96 / 87

Advancing to step 2:
If we divide 96 by 87, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 87 from 96, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 87

Going ahead to step 3:
91 divided by 87 is 1 with a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtracting 87 from 91 leaves us with 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 87

Going ahead to step 4:
If we divide 48 by 87, we get 0 and a remainder of 48.
Use 0 as the next digit of our solution. 
Result so far: 110.0
Deduct 0 from 48 and we're left with 48.
Take the next digit (2) from the dividend and append it to 48, then repeat: 482 / 87

Moving on to step 5:
The number 87 fits into 482 5 times, leaving a remainder of 47.
Put 5 as the next digit of the answer. 
Result so far: 1105.0
Deduct 435 from 482 and we're left with 47.
Bring next digit (3) of the dividend behind the 47 and repeat the process: 473 / 87

Step 6:
When dividing 473 by 87, we get 5 with a remainder of 38.
Record the quotient 5 as the next digit in the result. 
Result so far: 11055.0
Subtract 435 from 473 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 7:
380 divided by 87 is 4 with a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 11055.4
If we take 348 away from 380, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 8:
When dividing 320 by 87, we get 3 with a remainder of 59.
The next digit of our result is 3. 
Result so far: 11055.43
If we take 261 away from 320, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 9:
When dividing 590 by 87, we get 6 with a remainder of 68.
The number 6 becomes the next digit in our result. 
Result so far: 11055.436
Subtract 522 from 590 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 10:
The number 87 fits into 680 7 times, leaving a remainder of 71.
Use 7 as the next digit of our solution. 
Result so far: 11055.4367
Subtracting 609 from 680 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 11:
If we divide 710 by 87, we get 8 and a remainder of 14.
The next digit of our result is 8. 
Result so far: 11055.43678
If we subtract 696 from 710, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 12:
If we divide 140 by 87, we get 1 and a remainder of 53.
The next digit of our result is 1. 
Result so far: 11055.436781
The remainder is 53 after subtracting 87 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 13:
When dividing 530 by 87, we get 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 11055.4367816
Subtracting 522 from 530 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 14:
The number 87 fits into 80 0 times, leaving a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 11055.4367816
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 11055.4367816, and the remainder is 8e-08.