75379 divided by 91 
The aim is to understand the frequency of 91 in 75379.

Step 1:
If we divide 7 by 91, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 91

Going ahead to step 2:
91 goes into 75 0 times with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 75 to get 75.
Bring next digit (3) of the dividend behind the 75 and repeat the process: 753 / 91

Advancing to step 3:
If we divide 753 by 91, we get 8 and a remainder of 25.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 728 from 753 to get 25.
Take the next digit (7) from the dividend and append it to 25, then repeat: 257 / 91

Moving on to step 4:
The number 91 fits into 257 2 times, leaving a remainder of 75.
Write down 2 as next digit of the result. 
Result so far: 82.0
Subtracting 182 from 257 leaves us with 75.
Grab the next digit (9) from the dividend, add it to 75, then carry on: 759 / 91

On to step 5:
91 goes into 759 8 times with a remainder of 31.
Record the quotient 8 as the next digit in the result. 
Result so far: 828.0
If we subtract 728 from 759, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 6:
91 goes into 310 3 times with a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 828.3
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 7:
91 can be fit into 370 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 828.34
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.

Let's proceed to step 8:
When dividing 60 by 91, we get 0 with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 828.34
Subtract 0 from 60 to 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.

Step 9:
When dividing 600 by 91, we get 6 with a remainder of 54.
Record the quotient 6 as the next digit in the result. 
Result so far: 828.3406
Subtract 546 from 600 to 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.

Going ahead to step 10:
91 goes into 540 5 times with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 828.34065
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.

Step 11:
850 divided by 91 is 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 828.340659
Deduct 819 from 850 and we're left 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.

Moving on to step 12:
310 divided by 91 is 3 with a remainder of 37.
Put 3 as the next digit of the answer. 
Result so far: 828.3406593
If we subtract 273 from 310, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 13:
When dividing 370 by 91, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 828.34065934
If we subtract 364 from 370, we 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.

The final outcome is 828.34065934, with a leftover of 6e-09.