We divide 90080165 by 91
The aim is to understand the frequency of 91 in 90080165.

Step 1:
91 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 91

Step 2:
91 can be fit into 90 0 times, resulting in a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Fetch the next digit (0) from the dividend, attach it to 90 and continue: 900 / 91

Advancing to step 3:
900 divided by 91 is 9 with a remainder of 81.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 81 after subtracting 819 from 900.
Include the next digit (8) from the dividend after 81, then repeat: 818 / 91

Moving on to step 4:
The number 91 fits into 818 8 times, leaving a remainder of 90.
Record the quotient 8 as the next digit in the result. 
Result so far: 98.0
Deduct 728 from 818 and we're left with 90.
Fetch the next digit (0) from the dividend, attach it to 90 and continue: 900 / 91

Advancing to step 5:
91 goes into 900 9 times with a remainder of 81.
Record the quotient 9 as the next digit in the result. 
Result so far: 989.0
Subtracting 819 from 900 leaves us with 81.
Append the next digit (1) from the dividend to 81 and continue with: 811 / 91

Let's proceed to step 6:
The number 91 fits into 811 8 times, leaving a remainder of 83.
The next digit of our result is 8. 
Result so far: 9898.0
Deduct 728 from 811 and we're left with 83.
Append the next digit (6) from the dividend to 83 and continue with: 836 / 91

Let's proceed to step 7:
When dividing 836 by 91, we get 9 with a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 98989.0
Subtracting 819 from 836 leaves us with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 91

Moving on to step 8:
91 can be fit into 175 1 times, resulting in a remainder of 84.
Use 1 as the next digit of our solution. 
Result so far: 989891.0
If we take 91 away from 175, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 9:
840 divided by 91 is 9 with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 989891.9
Subtract 819 from 840 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 10:
91 can be fit into 210 2 times, resulting in a remainder of 28.
The next digit of our result is 2. 
Result so far: 989891.92
Subtracting 182 from 210 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 11:
91 goes into 280 3 times with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 989891.923
If we subtract 273 from 280, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 12:
91 can be fit into 70 0 times, resulting in a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 989891.923
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 13:
91 goes into 700 7 times with a remainder of 63.
Write down 7 as next digit of the result. 
Result so far: 989891.92307
If we take 637 away from 700, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 14:
If we divide 630 by 91, we get 6 and a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 989891.923076
If we subtract 546 from 630, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 15:
91 can be fit into 840 9 times, resulting in a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 989891.9230769
Subtract 819 from 840 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 16:
91 can be fit into 210 2 times, resulting in a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 989891.92307692
The remainder is 28 after subtracting 182 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

In conclusion, the division gives 989891.92307692 with a balance of 2.8e-08.