13991125 divided by 317 
The aim is to understand the frequency of 317 in 13991125.

Let's proceed to step 1:
If we divide 1 by 317, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 317

Step 2:
The number 317 fits into 13 0 times, leaving a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 317

Let's proceed to step 3:
317 can be fit into 139 0 times, resulting in a remainder of 139.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 139, we end up with 139.
Grab the next digit (9) from the dividend, add it to 139, then carry on: 1399 / 317

Going ahead to step 4:
1399 divided by 317 is 4 with a remainder of 131.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 1268 from 1399 to get 131.
Take the next digit (1) from the dividend and append it to 131, then repeat: 1311 / 317

On to step 5:
317 goes into 1311 4 times with a remainder of 43.
Record the quotient 4 as the next digit in the result. 
Result so far: 44.0
The remainder is 43 after subtracting 1268 from 1311.
Append the next digit (1) from the dividend to 43 and continue with: 431 / 317

Advancing to step 6:
The number 317 fits into 431 1 times, leaving a remainder of 114.
The next digit of our result is 1. 
Result so far: 441.0
The remainder is 114 after subtracting 317 from 431.
Bring next digit (2) of the dividend behind the 114 and repeat the process: 1142 / 317

On to step 7:
317 can be fit into 1142 3 times, resulting in a remainder of 191.
The next digit of our result is 3. 
Result so far: 4413.0
If we subtract 951 from 1142, we get 191.
Take the next digit (5) from the dividend and append it to 191, then repeat: 1915 / 317

Step 8:
317 can be fit into 1915 6 times, resulting in a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 44136.0
Subtracting 1902 from 1915 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 9:
When dividing 130 by 317, we get 0 with a remainder of 130.
The next digit of our result is 0. 
Result so far: 44136.0
The remainder is 130 after subtracting 0 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 10:
The number 317 fits into 1300 4 times, leaving a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 44136.04
Subtracting 1268 from 1300 leaves us 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.

Moving on to step 11:
317 goes into 320 1 times with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 44136.041
Subtract 317 from 320 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 12:
317 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 44136.041
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 13:
When dividing 300 by 317, we get 0 with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 44136.041
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

After the division, we end up with 44136.041 and a remainder of 0.0003.