We look at the division of 97612895 by 815 
The aim is to understand the frequency of 815 in 97612895.

Step 1:
The number 815 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 815

On to step 2:
815 can be fit into 97 0 times, resulting in a remainder of 97.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 97 and we're left with 97.
Grab the next digit (6) from the dividend, add it to 97, then carry on: 976 / 815

Let's proceed to step 3:
976 divided by 815 is 1 with a remainder of 161.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 815 away from 976, we end up with 161.
Fetch the next digit (1) from the dividend, attach it to 161 and continue: 1611 / 815

Moving on to step 4:
The number 815 fits into 1611 1 times, leaving a remainder of 796.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 815 from 1611 to get 796.
Append the next digit (2) from the dividend to 796 and continue with: 7962 / 815

Going ahead to step 5:
815 goes into 7962 9 times with a remainder of 627.
Put 9 as the next digit of the answer. 
Result so far: 119.0
Subtracting 7335 from 7962 leaves us with 627.
Grab the next digit (8) from the dividend, add it to 627, then carry on: 6278 / 815

Moving on to step 6:
6278 divided by 815 is 7 with a remainder of 573.
Write down 7 as next digit of the result. 
Result so far: 1197.0
The remainder is 573 after subtracting 5705 from 6278.
Append the next digit (9) from the dividend to 573 and continue with: 5739 / 815

On to step 7:
815 can be fit into 5739 7 times, resulting in a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 11977.0
If we take 5705 away from 5739, we end up with 34.
Take the next digit (5) from the dividend and append it to 34, then repeat: 345 / 815

Let's proceed to step 8:
The number 815 fits into 345 0 times, leaving a remainder of 345.
Use 0 as the next digit of our solution. 
Result so far: 119770.0
Subtracting 0 from 345 leaves us with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Advancing to step 9:
The number 815 fits into 3450 4 times, leaving a remainder of 190.
Use 4 as the next digit of our solution. 
Result so far: 119770.4
If we subtract 3260 from 3450, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Step 10:
The number 815 fits into 1900 2 times, leaving a remainder of 270.
Put 2 as the next digit of the answer. 
Result so far: 119770.42
If we take 1630 away from 1900, we end up with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Step 11:
2700 divided by 815 is 3 with a remainder of 255.
The number 3 becomes the next digit in our result. 
Result so far: 119770.423
The remainder is 255 after subtracting 2445 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Advancing to step 12:
When dividing 2550 by 815, we get 3 with a remainder of 105.
The number 3 becomes the next digit in our result. 
Result so far: 119770.4233
Subtracting 2445 from 2550 leaves us with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

After the division, we end up with 119770.4233 and a remainder of 0.00105.