252290 ÷ 91 
The aim is to understand the frequency of 91 in 252290.

Let's proceed to step 1:
If we divide 2 by 91, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 91

Moving on to step 2:
25 divided by 91 is 0 with a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Take the next digit (2) from the dividend and append it to 25, then repeat: 252 / 91

Moving on to step 3:
91 can be fit into 252 2 times, resulting in a remainder of 70.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 182 away from 252, we end up with 70.
Take the next digit (2) from the dividend and append it to 70, then repeat: 702 / 91

Step 4:
91 goes into 702 7 times with a remainder of 65.
Write down 7 as next digit of the result. 
Result so far: 27.0
If we subtract 637 from 702, we get 65.
Fetch the next digit (9) from the dividend, attach it to 65 and continue: 659 / 91

Advancing to step 5:
If we divide 659 by 91, we get 7 and a remainder of 22.
Put 7 as the next digit of the answer. 
Result so far: 277.0
Subtracting 637 from 659 leaves us with 22.
Fetch the next digit (0) from the dividend, attach it to 22 and continue: 220 / 91

Moving on to step 6:
220 divided by 91 is 2 with a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 2772.0
Subtracting 182 from 220 leaves us with 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:
91 goes into 380 4 times with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 2772.4
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:
When dividing 160 by 91, we get 1 with a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 2772.41
Deduct 91 from 160 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 9:
91 goes into 690 7 times with a remainder of 53.
Write down 7 as next digit of the result. 
Result so far: 2772.417
If we subtract 637 from 690, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Let's proceed to step 10:
91 goes into 530 5 times with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 2772.4175
Subtracting 455 from 530 leaves us 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.

On to step 11:
91 can be fit into 750 8 times, resulting in a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 2772.41758
Subtracting 728 from 750 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
The number 91 fits into 220 2 times, leaving a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 2772.417582
Subtracting 182 from 220 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 13:
91 goes into 380 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 2772.4175824
Subtract 364 from 380 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
When dividing 160 by 91, we get 1 with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 2772.41758241
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.

After the division, we end up with 2772.41758241 and a remainder of 6.9e-08.