We look at the division of 91318896 by 615 
The aim is to understand the frequency of 615 in 91318896.

Going ahead to step 1:
The number 615 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 615

Let's proceed to step 2:
615 goes into 91 0 times with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Grab the next digit (3) from the dividend, add it to 91, then carry on: 913 / 615

On to step 3:
615 can be fit into 913 1 times, resulting in a remainder of 298.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 615 from 913 and we're left with 298.
Grab the next digit (1) from the dividend, add it to 298, then carry on: 2981 / 615

On to step 4:
2981 divided by 615 is 4 with a remainder of 521.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we subtract 2460 from 2981, we get 521.
Grab the next digit (8) from the dividend, add it to 521, then carry on: 5218 / 615

Moving on to step 5:
If we divide 5218 by 615, we get 8 and a remainder of 298.
The number 8 becomes the next digit in our result. 
Result so far: 148.0
The remainder is 298 after subtracting 4920 from 5218.
Fetch the next digit (8) from the dividend, attach it to 298 and continue: 2988 / 615

On to step 6:
615 goes into 2988 4 times with a remainder of 528.
Record the quotient 4 as the next digit in the result. 
Result so far: 1484.0
Subtract 2460 from 2988 to get 528.
Bring next digit (9) of the dividend behind the 528 and repeat the process: 5289 / 615

Step 7:
615 goes into 5289 8 times with a remainder of 369.
Put 8 as the next digit of the answer. 
Result so far: 14848.0
If we take 4920 away from 5289, we end up with 369.
Grab the next digit (6) from the dividend, add it to 369, then carry on: 3696 / 615

Let's proceed to step 8:
3696 divided by 615 is 6 with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 148486.0
If we subtract 3690 from 3696, 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.

Moving on to step 9:
60 divided by 615 is 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 148486.0
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.

On to step 10:
If we divide 600 by 615, we get 0 and a remainder of 600.
The number 0 becomes the next digit in our result. 
Result so far: 148486.0
Subtracting 0 from 600 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

In conclusion, the division gives 148486.0 with a balance of 0.6.