257449 ÷ 91 
The aim is to understand the frequency of 91 in 257449.

Let's proceed to step 1:
If we divide 2 by 91, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 91

Advancing to step 2:
25 divided by 91 is 0 with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Append the next digit (7) from the dividend to 25 and continue with: 257 / 91

Going ahead to step 3:
If we divide 257 by 91, we get 2 and a remainder of 75.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 182 from 257 and we're left with 75.
Append the next digit (4) from the dividend to 75 and continue with: 754 / 91

On to step 4:
The number 91 fits into 754 8 times, leaving a remainder of 26.
Write down 8 as next digit of the result. 
Result so far: 28.0
Subtracting 728 from 754 leaves us with 26.
Take the next digit (4) from the dividend and append it to 26, then repeat: 264 / 91

Moving on to step 5:
264 divided by 91 is 2 with a remainder of 82.
Use 2 as the next digit of our solution. 
Result so far: 282.0
If we take 182 away from 264, we end up with 82.
Bring next digit (9) of the dividend behind the 82 and repeat the process: 829 / 91

Advancing to step 6:
91 goes into 829 9 times with a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 2829.0
If we subtract 819 from 829, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
100 divided by 91 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2829.1
The remainder is 9 after subtracting 91 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 8:
If we divide 90 by 91, we get 0 and a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 2829.1
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 9:
The number 91 fits into 900 9 times, leaving a remainder of 81.
The next digit of our result is 9. 
Result so far: 2829.109
If we subtract 819 from 900, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 10:
When dividing 810 by 91, we get 8 with a remainder of 82.
The next digit of our result is 8. 
Result so far: 2829.1098
Subtract 728 from 810 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 11:
820 divided by 91 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 2829.10989
If we subtract 819 from 820, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 12:
91 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 2829.10989
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 13:
100 divided by 91 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2829.1098901
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
When dividing 90 by 91, we get 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 2829.1098901
Subtracting 0 from 90 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

The quotient of the division is 2829.1098901, and the remainder is 9e-08.