We look at the division of 6274063 by 391 
The aim is to understand the frequency of 391 in 6274063.

Advancing to step 1:
6 divided by 391 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 391

Step 2:
If we divide 62 by 391, we get 0 and a remainder of 62.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 62 to get 62.
Include the next digit (7) from the dividend after 62, then repeat: 627 / 391

Going ahead to step 3:
If we divide 627 by 391, we get 1 and a remainder of 236.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 391 from 627 to get 236.
Grab the next digit (4) from the dividend, add it to 236, then carry on: 2364 / 391

Step 4:
If we divide 2364 by 391, we get 6 and a remainder of 18.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we subtract 2346 from 2364, we get 18.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 391

Going ahead to step 5:
If we divide 180 by 391, we get 0 and a remainder of 180.
The next digit of our result is 0. 
Result so far: 160.0
The remainder is 180 after subtracting 0 from 180.
Append the next digit (6) from the dividend to 180 and continue with: 1806 / 391

Step 6:
If we divide 1806 by 391, we get 4 and a remainder of 242.
Put 4 as the next digit of the answer. 
Result so far: 1604.0
Subtracting 1564 from 1806 leaves us with 242.
Take the next digit (3) from the dividend and append it to 242, then repeat: 2423 / 391

On to step 7:
391 goes into 2423 6 times with a remainder of 77.
Put 6 as the next digit of the answer. 
Result so far: 16046.0
Subtracting 2346 from 2423 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 8:
770 divided by 391 is 1 with a remainder of 379.
Use 1 as the next digit of our solution. 
Result so far: 16046.1
Deduct 391 from 770 and we're left with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Let's proceed to step 9:
391 can be fit into 3790 9 times, resulting in a remainder of 271.
The number 9 becomes the next digit in our result. 
Result so far: 16046.19
If we subtract 3519 from 3790, we get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Advancing to step 10:
391 can be fit into 2710 6 times, resulting in a remainder of 364.
The number 6 becomes the next digit in our result. 
Result so far: 16046.196
If we subtract 2346 from 2710, we get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 11:
391 can be fit into 3640 9 times, resulting in a remainder of 121.
Use 9 as the next digit of our solution. 
Result so far: 16046.1969
Subtracting 3519 from 3640 leaves us with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Step 12:
If we divide 1210 by 391, we get 3 and a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 16046.19693
If we subtract 1173 from 1210, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 13:
When dividing 370 by 391, we get 0 with a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 16046.19693
If we subtract 0 from 370, we get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Advancing to step 14:
When dividing 3700 by 391, we get 9 with a remainder of 181.
Write down 9 as next digit of the result. 
Result so far: 16046.1969309
Subtract 3519 from 3700 to get 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Step 15:
The number 391 fits into 1810 4 times, leaving a remainder of 246.
Use 4 as the next digit of our solution. 
Result so far: 16046.19693094
Subtracting 1564 from 1810 leaves us with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

After the division, we end up with 16046.19693094 and a remainder of 2.46e-07.