890836 divided by 91 
The aim is to understand the frequency of 91 in 890836.

Going ahead to step 1:
91 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 91

Moving on to step 2:
When dividing 89 by 91, we get 0 with a remainder of 89.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 89 leaves us with 89.
Append the next digit (0) from the dividend to 89 and continue with: 890 / 91

Moving on to step 3:
The number 91 fits into 890 9 times, leaving a remainder of 71.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 819 from 890, we get 71.
Grab the next digit (8) from the dividend, add it to 71, then carry on: 718 / 91

Moving on to step 4:
91 goes into 718 7 times with a remainder of 81.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Deduct 637 from 718 and we're left with 81.
Bring next digit (3) of the dividend behind the 81 and repeat the process: 813 / 91

Going ahead to step 5:
When dividing 813 by 91, we get 8 with a remainder of 85.
Record the quotient 8 as the next digit in the result. 
Result so far: 978.0
Subtracting 728 from 813 leaves us with 85.
Include the next digit (6) from the dividend after 85, then repeat: 856 / 91

Going ahead to step 6:
The number 91 fits into 856 9 times, leaving a remainder of 37.
The number 9 becomes the next digit in our result. 
Result so far: 9789.0
If we take 819 away from 856, we end up 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.

On to step 7:
370 divided by 91 is 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 9789.4
Deduct 364 from 370 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
If we divide 60 by 91, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 9789.4
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
600 divided by 91 is 6 with a remainder of 54.
Use 6 as the next digit of our solution. 
Result so far: 9789.406
Subtracting 546 from 600 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 10:
If we divide 540 by 91, we get 5 and a remainder of 85.
Record the quotient 5 as the next digit in the result. 
Result so far: 9789.4065
Subtract 455 from 540 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 11:
The number 91 fits into 850 9 times, leaving a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 9789.40659
The remainder is 31 after subtracting 819 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 12:
When dividing 310 by 91, we get 3 with a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 9789.406593
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 13:
91 goes into 370 4 times with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 9789.4065934
Deduct 364 from 370 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 14:
When dividing 60 by 91, we get 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 9789.4065934
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 9789.4065934 with a remaining 6e-08.