We look at the division of 21173043 by 936 
The aim is to understand the frequency of 936 in 21173043.

Step 1:
If we divide 2 by 936, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
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 / 936

Moving on to step 2:
If we divide 21 by 936, we get 0 and a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Grab the next digit (1) from the dividend, add it to 21, then carry on: 211 / 936

On to step 3:
211 divided by 936 is 0 with a remainder of 211.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Grab the next digit (7) from the dividend, add it to 211, then carry on: 2117 / 936

Advancing to step 4:
When dividing 2117 by 936, we get 2 with a remainder of 245.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 1872 from 2117, we get 245.
Include the next digit (3) from the dividend after 245, then repeat: 2453 / 936

On to step 5:
When dividing 2453 by 936, we get 2 with a remainder of 581.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we subtract 1872 from 2453, we get 581.
Grab the next digit (0) from the dividend, add it to 581, then carry on: 5810 / 936

Step 6:
The number 936 fits into 5810 6 times, leaving a remainder of 194.
Write down 6 as next digit of the result. 
Result so far: 226.0
If we subtract 5616 from 5810, we get 194.
Bring next digit (4) of the dividend behind the 194 and repeat the process: 1944 / 936

Going ahead to step 7:
If we divide 1944 by 936, we get 2 and a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 2262.0
If we take 1872 away from 1944, we end up with 72.
Grab the next digit (3) from the dividend, add it to 72, then carry on: 723 / 936

Step 8:
If we divide 723 by 936, we get 0 and a remainder of 723.
Write down 0 as next digit of the result. 
Result so far: 22620.0
If we subtract 0 from 723, we get 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

On to step 9:
The number 936 fits into 7230 7 times, leaving a remainder of 678.
Write down 7 as next digit of the result. 
Result so far: 22620.7
The remainder is 678 after subtracting 6552 from 7230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6780, and continue the process.

Advancing to step 10:
936 goes into 6780 7 times with a remainder of 228.
The number 7 becomes the next digit in our result. 
Result so far: 22620.77
The remainder is 228 after subtracting 6552 from 6780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

The final result is 22620.77 with a remainder of 0.228.