Let's divide 90068231 by 391
The aim is to understand the frequency of 391 in 90068231.

Going ahead to step 1:
9 divided by 391 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 391

On to step 2:
When dividing 90 by 391, we get 0 with a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Bring next digit (0) of the dividend behind the 90 and repeat the process: 900 / 391

Going ahead to step 3:
391 goes into 900 2 times with a remainder of 118.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 782 from 900 leaves us with 118.
Include the next digit (6) from the dividend after 118, then repeat: 1186 / 391

Let's proceed to step 4:
1186 divided by 391 is 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 23.0
The remainder is 13 after subtracting 1173 from 1186.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 391

Advancing to step 5:
When dividing 138 by 391, we get 0 with a remainder of 138.
Record the quotient 0 as the next digit in the result. 
Result so far: 230.0
If we take 0 away from 138, we end up with 138.
Fetch the next digit (2) from the dividend, attach it to 138 and continue: 1382 / 391

Advancing to step 6:
When dividing 1382 by 391, we get 3 with a remainder of 209.
The number 3 becomes the next digit in our result. 
Result so far: 2303.0
If we subtract 1173 from 1382, we get 209.
Fetch the next digit (3) from the dividend, attach it to 209 and continue: 2093 / 391

Going ahead to step 7:
391 can be fit into 2093 5 times, resulting in a remainder of 138.
Use 5 as the next digit of our solution. 
Result so far: 23035.0
Subtracting 1955 from 2093 leaves us with 138.
Grab the next digit (1) from the dividend, add it to 138, then carry on: 1381 / 391

Moving on to step 8:
1381 divided by 391 is 3 with a remainder of 208.
The number 3 becomes the next digit in our result. 
Result so far: 230353.0
If we take 1173 away from 1381, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

On to step 9:
391 goes into 2080 5 times with a remainder of 125.
The number 5 becomes the next digit in our result. 
Result so far: 230353.5
Subtract 1955 from 2080 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 10:
When dividing 1250 by 391, we get 3 with a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 230353.53
Deduct 1173 from 1250 and we're left 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.

Let's proceed to step 11:
770 divided by 391 is 1 with a remainder of 379.
Put 1 as the next digit of the answer. 
Result so far: 230353.531
The remainder is 379 after subtracting 391 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

On to step 12:
391 goes into 3790 9 times with a remainder of 271.
Write down 9 as next digit of the result. 
Result so far: 230353.5319
Subtracting 3519 from 3790 leaves us with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

On to step 13:
When dividing 2710 by 391, we get 6 with a remainder of 364.
Write down 6 as next digit of the result. 
Result so far: 230353.53196
If we take 2346 away from 2710, we end up with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Moving on to step 14:
3640 divided by 391 is 9 with a remainder of 121.
Record the quotient 9 as the next digit in the result. 
Result so far: 230353.531969
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.

Moving on to step 15:
If we divide 1210 by 391, we get 3 and a remainder of 37.
Put 3 as the next digit of the answer. 
Result so far: 230353.5319693
Deduct 1173 from 1210 and we're left with 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 16:
391 can be fit into 370 0 times, resulting in a remainder of 370.
Record the quotient 0 as the next digit in the result. 
Result so far: 230353.5319693
Subtract 0 from 370 to 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.

The final result is 230353.5319693 with a remainder of 3.7e-07.