We look at the division of 68055506 by 391 
The aim is to understand the frequency of 391 in 68055506.

Advancing to step 1:
When dividing 6 by 391, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 391

Advancing to step 2:
The number 391 fits into 68 0 times, leaving a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Take the next digit (0) from the dividend and append it to 68, then repeat: 680 / 391

On to step 3:
680 divided by 391 is 1 with a remainder of 289.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 289 after subtracting 391 from 680.
Fetch the next digit (5) from the dividend, attach it to 289 and continue: 2895 / 391

Going ahead to step 4:
When dividing 2895 by 391, we get 7 with a remainder of 158.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we take 2737 away from 2895, we end up with 158.
Grab the next digit (5) from the dividend, add it to 158, then carry on: 1585 / 391

Step 5:
When dividing 1585 by 391, we get 4 with a remainder of 21.
Use 4 as the next digit of our solution. 
Result so far: 174.0
The remainder is 21 after subtracting 1564 from 1585.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 391

On to step 6:
If we divide 215 by 391, we get 0 and a remainder of 215.
The next digit of our result is 0. 
Result so far: 1740.0
If we take 0 away from 215, we end up with 215.
Include the next digit (0) from the dividend after 215, then repeat: 2150 / 391

Moving on to step 7:
When dividing 2150 by 391, we get 5 with a remainder of 195.
Record the quotient 5 as the next digit in the result. 
Result so far: 17405.0
If we take 1955 away from 2150, we end up with 195.
Include the next digit (6) from the dividend after 195, then repeat: 1956 / 391

Let's proceed to step 8:
1956 divided by 391 is 5 with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 174055.0
The remainder is 1 after subtracting 1955 from 1956.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
If we divide 10 by 391, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 174055.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
If we divide 100 by 391, we get 0 and a remainder of 100.
The next digit of our result is 0. 
Result so far: 174055.0
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The quotient of the division is 174055.0, and the remainder is 0.1.