We divide 31383529 by 391
The aim is to understand the frequency of 391 in 31383529.

On to step 1:
If we divide 3 by 391, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 391

Step 2:
391 can be fit into 31 0 times, resulting in a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 391

Let's proceed to step 3:
391 goes into 313 0 times with a remainder of 313.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 313 to get 313.
Fetch the next digit (8) from the dividend, attach it to 313 and continue: 3138 / 391

Going ahead to step 4:
If we divide 3138 by 391, we get 8 and a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 3128 away from 3138, we end up with 10.
Grab the next digit (3) from the dividend, add it to 10, then carry on: 103 / 391

Moving on to step 5:
When dividing 103 by 391, we get 0 with a remainder of 103.
Write down 0 as next digit of the result. 
Result so far: 80.0
If we subtract 0 from 103, we get 103.
Fetch the next digit (5) from the dividend, attach it to 103 and continue: 1035 / 391

Going ahead to step 6:
1035 divided by 391 is 2 with a remainder of 253.
The number 2 becomes the next digit in our result. 
Result so far: 802.0
The remainder is 253 after subtracting 782 from 1035.
Include the next digit (2) from the dividend after 253, then repeat: 2532 / 391

Moving on to step 7:
When dividing 2532 by 391, we get 6 with a remainder of 186.
The number 6 becomes the next digit in our result. 
Result so far: 8026.0
Deduct 2346 from 2532 and we're left with 186.
Fetch the next digit (9) from the dividend, attach it to 186 and continue: 1869 / 391

Going ahead to step 8:
391 goes into 1869 4 times with a remainder of 305.
Write down 4 as next digit of the result. 
Result so far: 80264.0
Deduct 1564 from 1869 and we're left with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 9:
When dividing 3050 by 391, we get 7 with a remainder of 313.
The next digit of our result is 7. 
Result so far: 80264.7
Deduct 2737 from 3050 and we're left with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Step 10:
When dividing 3130 by 391, we get 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 80264.78
Subtract 3128 from 3130 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
391 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 80264.78
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
391 goes into 200 0 times with a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 80264.78
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 80264.78 with a remaining 0.002.