63492775 divided by 391 
The aim is to understand the frequency of 391 in 63492775.

On to step 1:
391 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 391

On to step 2:
391 goes into 63 0 times with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Grab the next digit (4) from the dividend, add it to 63, then carry on: 634 / 391

Advancing to step 3:
If we divide 634 by 391, we get 1 and a remainder of 243.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 391 from 634 leaves us with 243.
Append the next digit (9) from the dividend to 243 and continue with: 2439 / 391

Going ahead to step 4:
When dividing 2439 by 391, we get 6 with a remainder of 93.
The next digit of our result is 6. 
Result so far: 16.0
Subtract 2346 from 2439 to get 93.
Take the next digit (2) from the dividend and append it to 93, then repeat: 932 / 391

Step 5:
391 goes into 932 2 times with a remainder of 150.
Write down 2 as next digit of the result. 
Result so far: 162.0
If we subtract 782 from 932, we get 150.
Append the next digit (7) from the dividend to 150 and continue with: 1507 / 391

Advancing to step 6:
391 can be fit into 1507 3 times, resulting in a remainder of 334.
Put 3 as the next digit of the answer. 
Result so far: 1623.0
If we subtract 1173 from 1507, we get 334.
Bring next digit (7) of the dividend behind the 334 and repeat the process: 3347 / 391

Advancing to step 7:
3347 divided by 391 is 8 with a remainder of 219.
Put 8 as the next digit of the answer. 
Result so far: 16238.0
Deduct 3128 from 3347 and we're left with 219.
Append the next digit (5) from the dividend to 219 and continue with: 2195 / 391

Moving on to step 8:
If we divide 2195 by 391, we get 5 and a remainder of 240.
Write down 5 as next digit of the result. 
Result so far: 162385.0
If we take 1955 away from 2195, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 9:
The number 391 fits into 2400 6 times, leaving a remainder of 54.
Use 6 as the next digit of our solution. 
Result so far: 162385.6
Subtracting 2346 from 2400 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 10:
When dividing 540 by 391, we get 1 with a remainder of 149.
Use 1 as the next digit of our solution. 
Result so far: 162385.61
The remainder is 149 after subtracting 391 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Going ahead to step 11:
1490 divided by 391 is 3 with a remainder of 317.
The number 3 becomes the next digit in our result. 
Result so far: 162385.613
If we take 1173 away from 1490, we end up with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

On to step 12:
391 can be fit into 3170 8 times, resulting in a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 162385.6138
Deduct 3128 from 3170 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 13:
If we divide 420 by 391, we get 1 and a remainder of 29.
The next digit of our result is 1. 
Result so far: 162385.61381
If we take 391 away from 420, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 14:
290 divided by 391 is 0 with a remainder of 290.
The next digit of our result is 0. 
Result so far: 162385.61381
If we subtract 0 from 290, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Going ahead to step 15:
The number 391 fits into 2900 7 times, leaving a remainder of 163.
The next digit of our result is 7. 
Result so far: 162385.6138107
Deduct 2737 from 2900 and we're left with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Going ahead to step 16:
When dividing 1630 by 391, we get 4 with a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 162385.61381074
Deduct 1564 from 1630 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

After the division, we end up with 162385.61381074 and a remainder of 6.6e-08.