63924207 divided by 391 
The aim is to understand the frequency of 391 in 63924207.

Advancing to step 1:
When dividing 6 by 391, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 391

Going ahead to step 2:
391 goes into 63 0 times with a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Append the next digit (9) from the dividend to 63 and continue with: 639 / 391

On to step 3:
391 goes into 639 1 times with a remainder of 248.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 391 away from 639, we end up with 248.
Take the next digit (2) from the dividend and append it to 248, then repeat: 2482 / 391

Advancing to step 4:
The number 391 fits into 2482 6 times, leaving a remainder of 136.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we subtract 2346 from 2482, we get 136.
Fetch the next digit (4) from the dividend, attach it to 136 and continue: 1364 / 391

On to step 5:
391 can be fit into 1364 3 times, resulting in a remainder of 191.
The next digit of our result is 3. 
Result so far: 163.0
If we subtract 1173 from 1364, we get 191.
Grab the next digit (2) from the dividend, add it to 191, then carry on: 1912 / 391

Moving on to step 6:
391 goes into 1912 4 times with a remainder of 348.
Use 4 as the next digit of our solution. 
Result so far: 1634.0
Subtracting 1564 from 1912 leaves us with 348.
Take the next digit (0) from the dividend and append it to 348, then repeat: 3480 / 391

Going ahead to step 7:
3480 divided by 391 is 8 with a remainder of 352.
Put 8 as the next digit of the answer. 
Result so far: 16348.0
If we take 3128 away from 3480, we end up with 352.
Append the next digit (7) from the dividend to 352 and continue with: 3527 / 391

Let's proceed to step 8:
3527 divided by 391 is 9 with a remainder of 8.
The next digit of our result is 9. 
Result so far: 163489.0
Deduct 3519 from 3527 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
391 goes into 80 0 times with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 163489.0
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 10:
When dividing 800 by 391, we get 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 163489.02
Subtract 782 from 800 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 11:
391 can be fit into 180 0 times, resulting in a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 163489.02
Subtract 0 from 180 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 12:
391 goes into 1800 4 times with a remainder of 236.
Put 4 as the next digit of the answer. 
Result so far: 163489.0204
The remainder is 236 after subtracting 1564 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Advancing to step 13:
The number 391 fits into 2360 6 times, leaving a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 163489.02046
If we take 2346 away from 2360, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 14:
If we divide 140 by 391, we get 0 and a remainder of 140.
Write down 0 as next digit of the result. 
Result so far: 163489.02046
Subtracting 0 from 140 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 15:
If we divide 1400 by 391, we get 3 and a remainder of 227.
The next digit of our result is 3. 
Result so far: 163489.0204603
Subtract 1173 from 1400 to get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Going ahead to step 16:
If we divide 2270 by 391, we get 5 and a remainder of 315.
The next digit of our result is 5. 
Result so far: 163489.02046035
Subtract 1955 from 2270 to get 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Our division results in 163489.02046035 with a remaining 3.15e-07.