We look at the division of 45356 by 91 
The aim is to understand the frequency of 91 in 45356.

Going ahead to step 1:
The number 91 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 91

Advancing to step 2:
If we divide 45 by 91, we get 0 and a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Append the next digit (3) from the dividend to 45 and continue with: 453 / 91

Advancing to step 3:
If we divide 453 by 91, we get 4 and a remainder of 89.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 364 from 453, we get 89.
Bring next digit (5) of the dividend behind the 89 and repeat the process: 895 / 91

Advancing to step 4:
91 goes into 895 9 times with a remainder of 76.
Put 9 as the next digit of the answer. 
Result so far: 49.0
If we subtract 819 from 895, we get 76.
Append the next digit (6) from the dividend to 76 and continue with: 766 / 91

Advancing to step 5:
766 divided by 91 is 8 with a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 498.0
Deduct 728 from 766 and we're left 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.

Let's proceed to step 6:
If we divide 380 by 91, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 498.4
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.

Moving on to step 7:
91 can be fit into 160 1 times, resulting in a remainder of 69.
Put 1 as the next digit of the answer. 
Result so far: 498.41
The remainder is 69 after subtracting 91 from 160.
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 8:
If we divide 690 by 91, we get 7 and a remainder of 53.
The number 7 becomes the next digit in our result. 
Result so far: 498.417
Subtracting 637 from 690 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 9:
91 can be fit into 530 5 times, resulting in a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 498.4175
Subtract 455 from 530 to get 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 10:
750 divided by 91 is 8 with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 498.41758
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.

Moving on to step 11:
When dividing 220 by 91, we get 2 with a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 498.417582
The remainder is 38 after subtracting 182 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 12:
91 can be fit into 380 4 times, resulting in a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 498.4175824
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 13:
91 can be fit into 160 1 times, resulting in a remainder of 69.
Put 1 as the next digit of the answer. 
Result so far: 498.41758241
If we take 91 away from 160, we end up 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.

The quotient of the division is 498.41758241, and the remainder is 6.9e-08.