We look at the division of 861444 by 91 
The aim is to understand the frequency of 91 in 861444.

Let's proceed to step 1:
91 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 91

Step 2:
If we divide 86 by 91, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 91

Step 3:
If we divide 861 by 91, we get 9 and a remainder of 42.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 819 away from 861, we end up with 42.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 91

Advancing to step 4:
When dividing 424 by 91, we get 4 with a remainder of 60.
Put 4 as the next digit of the answer. 
Result so far: 94.0
If we take 364 away from 424, we end up with 60.
Include the next digit (4) from the dividend after 60, then repeat: 604 / 91

Let's proceed to step 5:
604 divided by 91 is 6 with a remainder of 58.
Write down 6 as next digit of the result. 
Result so far: 946.0
Deduct 546 from 604 and we're left with 58.
Grab the next digit (4) from the dividend, add it to 58, then carry on: 584 / 91

On to step 6:
When dividing 584 by 91, we get 6 with a remainder of 38.
The next digit of our result is 6. 
Result so far: 9466.0
Subtract 546 from 584 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 7:
The number 91 fits into 380 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 9466.4
Deduct 364 from 380 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 8:
If we divide 160 by 91, we get 1 and a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 9466.41
If we subtract 91 from 160, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 9:
The number 91 fits into 690 7 times, leaving a remainder of 53.
The next digit of our result is 7. 
Result so far: 9466.417
The remainder is 53 after subtracting 637 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 10:
91 can be fit into 530 5 times, resulting in a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 9466.4175
If we take 455 away from 530, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 11:
When dividing 750 by 91, we get 8 with a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 9466.41758
The remainder is 22 after subtracting 728 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 12:
91 can be fit into 220 2 times, resulting in a remainder of 38.
Record the quotient 2 as the next digit in the result. 
Result so far: 9466.417582
Subtract 182 from 220 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 13:
380 divided by 91 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 9466.4175824
Subtracting 364 from 380 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 14:
If we divide 160 by 91, we get 1 and a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 9466.41758241
Subtract 91 from 160 to get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

After the division, we end up with 9466.41758241 and a remainder of 6.9e-08.