We look at the division of 12570292 by 993 
The aim is to understand the frequency of 993 in 12570292.

Going ahead to step 1:
993 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 993

Step 2:
When dividing 12 by 993, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 993

Step 3:
The number 993 fits into 125 0 times, leaving a remainder of 125.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 125 leaves us with 125.
Take the next digit (7) from the dividend and append it to 125, then repeat: 1257 / 993

Going ahead to step 4:
993 goes into 1257 1 times with a remainder of 264.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 993 from 1257 to get 264.
Fetch the next digit (0) from the dividend, attach it to 264 and continue: 2640 / 993

Going ahead to step 5:
993 goes into 2640 2 times with a remainder of 654.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 1986 from 2640 leaves us with 654.
Bring next digit (2) of the dividend behind the 654 and repeat the process: 6542 / 993

Let's proceed to step 6:
When dividing 6542 by 993, we get 6 with a remainder of 584.
Write down 6 as next digit of the result. 
Result so far: 126.0
If we subtract 5958 from 6542, we get 584.
Include the next digit (9) from the dividend after 584, then repeat: 5849 / 993

Advancing to step 7:
993 can be fit into 5849 5 times, resulting in a remainder of 884.
Write down 5 as next digit of the result. 
Result so far: 1265.0
Subtracting 4965 from 5849 leaves us with 884.
Fetch the next digit (2) from the dividend, attach it to 884 and continue: 8842 / 993

Advancing to step 8:
993 can be fit into 8842 8 times, resulting in a remainder of 898.
The next digit of our result is 8. 
Result so far: 12658.0
If we subtract 7944 from 8842, we get 898.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8980, and continue the process.

Let's proceed to step 9:
The number 993 fits into 8980 9 times, leaving a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 12658.9
If we subtract 8937 from 8980, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 10:
If we divide 430 by 993, we get 0 and a remainder of 430.
The next digit of our result is 0. 
Result so far: 12658.9
If we subtract 0 from 430, we get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 11:
If we divide 4300 by 993, we get 4 and a remainder of 328.
Use 4 as the next digit of our solution. 
Result so far: 12658.904
Deduct 3972 from 4300 and we're left with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Moving on to step 12:
When dividing 3280 by 993, we get 3 with a remainder of 301.
Use 3 as the next digit of our solution. 
Result so far: 12658.9043
If we take 2979 away from 3280, we end up with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Moving on to step 13:
If we divide 3010 by 993, we get 3 and a remainder of 31.
Put 3 as the next digit of the answer. 
Result so far: 12658.90433
If we take 2979 away from 3010, 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.

Our division results in 12658.90433 with a remaining 3.1e-05.