We look at the division of 45219566 by 91 
The aim is to understand the frequency of 91 in 45219566.

Advancing to step 1:
91 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 91

Step 2:
91 can be fit into 45 0 times, resulting in a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Take the next digit (2) from the dividend and append it to 45, then repeat: 452 / 91

On to step 3:
When dividing 452 by 91, we get 4 with a remainder of 88.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 364 from 452, we get 88.
Fetch the next digit (1) from the dividend, attach it to 88 and continue: 881 / 91

Moving on to step 4:
91 goes into 881 9 times with a remainder of 62.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
The remainder is 62 after subtracting 819 from 881.
Append the next digit (9) from the dividend to 62 and continue with: 629 / 91

Advancing to step 5:
If we divide 629 by 91, we get 6 and a remainder of 83.
The next digit of our result is 6. 
Result so far: 496.0
If we take 546 away from 629, we end up with 83.
Append the next digit (5) from the dividend to 83 and continue with: 835 / 91

On to step 6:
91 goes into 835 9 times with a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 4969.0
The remainder is 16 after subtracting 819 from 835.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 91

Going ahead to step 7:
91 goes into 166 1 times with a remainder of 75.
Write down 1 as next digit of the result. 
Result so far: 49691.0
Deduct 91 from 166 and we're left with 75.
Take the next digit (6) from the dividend and append it to 75, then repeat: 756 / 91

On to step 8:
91 can be fit into 756 8 times, resulting in a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 496918.0
If we subtract 728 from 756, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
The number 91 fits into 280 3 times, leaving a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 496918.3
Deduct 273 from 280 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 10:
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: 496918.3
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 11:
91 goes into 700 7 times with a remainder of 63.
Use 7 as the next digit of our solution. 
Result so far: 496918.307
Deduct 637 from 700 and we're left 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 12:
91 goes into 630 6 times with a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 496918.3076
Subtract 546 from 630 to 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.

On to step 13:
91 goes into 840 9 times with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 496918.30769
If we take 819 away from 840, we end up with 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 14:
91 goes into 210 2 times with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 496918.307692
Subtract 182 from 210 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 15:
The number 91 fits into 280 3 times, leaving a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 496918.3076923
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 16:
70 divided by 91 is 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 496918.3076923
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.

In conclusion, the division gives 496918.3076923 with a balance of 7e-08.