We're dividing 63916878 by 791 
The aim is to understand the frequency of 791 in 63916878.

Moving on to step 1:
791 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 791

On to step 2:
When dividing 63 by 791, we get 0 with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 791

On to step 3:
If we divide 639 by 791, we get 0 and a remainder of 639.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 639, we end up with 639.
Append the next digit (1) from the dividend to 639 and continue with: 6391 / 791

Advancing to step 4:
The number 791 fits into 6391 8 times, leaving a remainder of 63.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 6328 from 6391 and we're left with 63.
Append the next digit (6) from the dividend to 63 and continue with: 636 / 791

Moving on to step 5:
791 goes into 636 0 times with a remainder of 636.
Use 0 as the next digit of our solution. 
Result so far: 80.0
If we take 0 away from 636, we end up with 636.
Grab the next digit (8) from the dividend, add it to 636, then carry on: 6368 / 791

Let's proceed to step 6:
When dividing 6368 by 791, we get 8 with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 808.0
Subtracting 6328 from 6368 leaves us with 40.
Fetch the next digit (7) from the dividend, attach it to 40 and continue: 407 / 791

Moving on to step 7:
791 can be fit into 407 0 times, resulting in a remainder of 407.
Write down 0 as next digit of the result. 
Result so far: 8080.0
Subtracting 0 from 407 leaves us with 407.
Grab the next digit (8) from the dividend, add it to 407, then carry on: 4078 / 791

On to step 8:
791 can be fit into 4078 5 times, resulting in a remainder of 123.
The next digit of our result is 5. 
Result so far: 80805.0
If we subtract 3955 from 4078, we get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Advancing to step 9:
When dividing 1230 by 791, we get 1 with a remainder of 439.
Use 1 as the next digit of our solution. 
Result so far: 80805.1
The remainder is 439 after subtracting 791 from 1230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

On to step 10:
If we divide 4390 by 791, we get 5 and a remainder of 435.
Use 5 as the next digit of our solution. 
Result so far: 80805.15
The remainder is 435 after subtracting 3955 from 4390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Let's proceed to step 11:
If we divide 4350 by 791, we get 5 and a remainder of 395.
Write down 5 as next digit of the result. 
Result so far: 80805.155
Subtracting 3955 from 4350 leaves us with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

After the division, we end up with 80805.155 and a remainder of 0.0395.