We're dividing 10211874 by 987 
The aim is to understand the frequency of 987 in 10211874.

Step 1:
The number 987 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 987

Moving on to step 2:
When dividing 10 by 987, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 987

Moving on to step 3:
102 divided by 987 is 0 with a remainder of 102.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 102 to get 102.
Take the next digit (1) from the dividend and append it to 102, then repeat: 1021 / 987

Advancing to step 4:
The number 987 fits into 1021 1 times, leaving a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 987 from 1021 leaves us with 34.
Grab the next digit (1) from the dividend, add it to 34, then carry on: 341 / 987

Step 5:
When dividing 341 by 987, we get 0 with a remainder of 341.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 341 to get 341.
Take the next digit (8) from the dividend and append it to 341, then repeat: 3418 / 987

Let's proceed to step 6:
The number 987 fits into 3418 3 times, leaving a remainder of 457.
Put 3 as the next digit of the answer. 
Result so far: 103.0
If we subtract 2961 from 3418, we get 457.
Fetch the next digit (7) from the dividend, attach it to 457 and continue: 4577 / 987

Advancing to step 7:
The number 987 fits into 4577 4 times, leaving a remainder of 629.
The number 4 becomes the next digit in our result. 
Result so far: 1034.0
Deduct 3948 from 4577 and we're left with 629.
Include the next digit (4) from the dividend after 629, then repeat: 6294 / 987

Advancing to step 8:
If we divide 6294 by 987, we get 6 and a remainder of 372.
Record the quotient 6 as the next digit in the result. 
Result so far: 10346.0
Subtracting 5922 from 6294 leaves us with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Let's proceed to step 9:
987 goes into 3720 3 times with a remainder of 759.
Put 3 as the next digit of the answer. 
Result so far: 10346.3
If we take 2961 away from 3720, we end up with 759.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7590, and continue the process.

Step 10:
If we divide 7590 by 987, we get 7 and a remainder of 681.
Use 7 as the next digit of our solution. 
Result so far: 10346.37
If we subtract 6909 from 7590, we get 681.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6810, and continue the process.

Let's proceed to step 11:
The number 987 fits into 6810 6 times, leaving a remainder of 888.
The next digit of our result is 6. 
Result so far: 10346.376
Deduct 5922 from 6810 and we're left with 888.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8880, and continue the process.

Advancing to step 12:
8880 divided by 987 is 8 with a remainder of 984.
Put 8 as the next digit of the answer. 
Result so far: 10346.3768
Subtract 7896 from 8880 to get 984.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9840, and continue the process.

Step 13:
The number 987 fits into 9840 9 times, leaving a remainder of 957.
Record the quotient 9 as the next digit in the result. 
Result so far: 10346.37689
Deduct 8883 from 9840 and we're left with 957.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9570, and continue the process.

Advancing to step 14:
9570 divided by 987 is 9 with a remainder of 687.
The next digit of our result is 9. 
Result so far: 10346.376899
Deduct 8883 from 9570 and we're left with 687.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6870, and continue the process.

Our division results in 10346.376899 with a remaining 6.87e-05.