Let's divide 17973234 by 91
The aim is to understand the frequency of 91 in 17973234.

Advancing to step 1:
The number 91 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 91

Going ahead to step 2:
17 divided by 91 is 0 with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Take the next digit (9) from the dividend and append it to 17, then repeat: 179 / 91

Advancing to step 3:
When dividing 179 by 91, we get 1 with a remainder of 88.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 88 after subtracting 91 from 179.
Include the next digit (7) from the dividend after 88, then repeat: 887 / 91

Let's proceed to step 4:
The number 91 fits into 887 9 times, leaving a remainder of 68.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
If we subtract 819 from 887, we get 68.
Grab the next digit (3) from the dividend, add it to 68, then carry on: 683 / 91

Let's proceed to step 5:
If we divide 683 by 91, we get 7 and a remainder of 46.
Put 7 as the next digit of the answer. 
Result so far: 197.0
The remainder is 46 after subtracting 637 from 683.
Bring next digit (2) of the dividend behind the 46 and repeat the process: 462 / 91

On to step 6:
91 can be fit into 462 5 times, resulting in a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 1975.0
Subtract 455 from 462 to get 7.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 91

Let's proceed to step 7:
If we divide 73 by 91, we get 0 and a remainder of 73.
Use 0 as the next digit of our solution. 
Result so far: 19750.0
Deduct 0 from 73 and we're left with 73.
Append the next digit (4) from the dividend to 73 and continue with: 734 / 91

Step 8:
The number 91 fits into 734 8 times, leaving a remainder of 6.
The next digit of our result is 8. 
Result so far: 197508.0
Subtract 728 from 734 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
91 goes into 60 0 times with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 197508.0
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 10:
If we divide 600 by 91, we get 6 and a remainder of 54.
Put 6 as the next digit of the answer. 
Result so far: 197508.06
Subtracting 546 from 600 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 11:
91 can be fit into 540 5 times, resulting in a remainder of 85.
The next digit of our result is 5. 
Result so far: 197508.065
Subtract 455 from 540 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Let's proceed to step 12:
If we divide 850 by 91, we get 9 and a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 197508.0659
If we take 819 away from 850, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 13:
If we divide 310 by 91, we get 3 and a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 197508.06593
The remainder is 37 after subtracting 273 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 14:
370 divided by 91 is 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 197508.065934
The remainder is 6 after subtracting 364 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 15:
If we divide 60 by 91, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 197508.065934
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 16:
91 can be fit into 600 6 times, resulting in a remainder of 54.
Record the quotient 6 as the next digit in the result. 
Result so far: 197508.06593406
If we subtract 546 from 600, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final result is 197508.06593406 with a remainder of 5.4e-08.