43313713 ÷ 921 
The aim is to understand the frequency of 921 in 43313713.

Advancing to step 1:
The number 921 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 921

Going ahead to step 2:
921 goes into 43 0 times with a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Include the next digit (3) from the dividend after 43, then repeat: 433 / 921

Let's proceed to step 3:
921 goes into 433 0 times with a remainder of 433.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 433 after subtracting 0 from 433.
Include the next digit (1) from the dividend after 433, then repeat: 4331 / 921

Step 4:
If we divide 4331 by 921, we get 4 and a remainder of 647.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 3684 from 4331 and we're left with 647.
Take the next digit (3) from the dividend and append it to 647, then repeat: 6473 / 921

Moving on to step 5:
When dividing 6473 by 921, we get 7 with a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 47.0
Subtract 6447 from 6473 to get 26.
Bring next digit (7) of the dividend behind the 26 and repeat the process: 267 / 921

Advancing to step 6:
921 can be fit into 267 0 times, resulting in a remainder of 267.
Use 0 as the next digit of our solution. 
Result so far: 470.0
Subtract 0 from 267 to get 267.
Grab the next digit (1) from the dividend, add it to 267, then carry on: 2671 / 921

Going ahead to step 7:
The number 921 fits into 2671 2 times, leaving a remainder of 829.
The number 2 becomes the next digit in our result. 
Result so far: 4702.0
Subtracting 1842 from 2671 leaves us with 829.
Fetch the next digit (3) from the dividend, attach it to 829 and continue: 8293 / 921

Moving on to step 8:
921 can be fit into 8293 9 times, resulting in a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 47029.0
Subtract 8289 from 8293 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
40 divided by 921 is 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 47029.0
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
921 can be fit into 400 0 times, resulting in a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 47029.0
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

After the division, we end up with 47029.0 and a remainder of 0.4.