123211 divided by 91 
The aim is to understand the frequency of 91 in 123211.

Going ahead to step 1:
The number 91 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 91

Going ahead to step 2:
91 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 91

Moving on to step 3:
If we divide 123 by 91, we get 1 and a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 91 from 123 leaves us with 32.
Include the next digit (2) from the dividend after 32, then repeat: 322 / 91

Let's proceed to step 4:
91 goes into 322 3 times with a remainder of 49.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Deduct 273 from 322 and we're left with 49.
Grab the next digit (1) from the dividend, add it to 49, then carry on: 491 / 91

Step 5:
The number 91 fits into 491 5 times, leaving a remainder of 36.
Record the quotient 5 as the next digit in the result. 
Result so far: 135.0
If we subtract 455 from 491, we get 36.
Append the next digit (1) from the dividend to 36 and continue with: 361 / 91

Moving on to step 6:
The number 91 fits into 361 3 times, leaving a remainder of 88.
Use 3 as the next digit of our solution. 
Result so far: 1353.0
Deduct 273 from 361 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 7:
When dividing 880 by 91, we get 9 with a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 1353.9
The remainder is 61 after subtracting 819 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 8:
If we divide 610 by 91, we get 6 and a remainder of 64.
The next digit of our result is 6. 
Result so far: 1353.96
Deduct 546 from 610 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
640 divided by 91 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 1353.967
If we subtract 637 from 640, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 10:
If we divide 30 by 91, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 1353.967
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 11:
If we divide 300 by 91, we get 3 and a remainder of 27.
Write down 3 as next digit of the result. 
Result so far: 1353.96703
Subtract 273 from 300 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 12:
If we divide 270 by 91, we get 2 and a remainder of 88.
The next digit of our result is 2. 
Result so far: 1353.967032
If we subtract 182 from 270, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 13:
91 can be fit into 880 9 times, resulting in a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 1353.9670329
Subtract 819 from 880 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 14:
When dividing 610 by 91, we get 6 with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 1353.96703296
Subtracting 546 from 610 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Our division results in 1353.96703296 with a remaining 6.4e-08.