We look at the division of 81253010 by 613 
The aim is to understand the frequency of 613 in 81253010.

On to step 1:
613 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 613

Step 2:
613 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Include the next digit (2) from the dividend after 81, then repeat: 812 / 613

Moving on to step 3:
The number 613 fits into 812 1 times, leaving a remainder of 199.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 613 away from 812, we end up with 199.
Bring next digit (5) of the dividend behind the 199 and repeat the process: 1995 / 613

On to step 4:
613 can be fit into 1995 3 times, resulting in a remainder of 156.
Use 3 as the next digit of our solution. 
Result so far: 13.0
The remainder is 156 after subtracting 1839 from 1995.
Include the next digit (3) from the dividend after 156, then repeat: 1563 / 613

Advancing to step 5:
The number 613 fits into 1563 2 times, leaving a remainder of 337.
Put 2 as the next digit of the answer. 
Result so far: 132.0
Subtracting 1226 from 1563 leaves us with 337.
Grab the next digit (0) from the dividend, add it to 337, then carry on: 3370 / 613

Advancing to step 6:
The number 613 fits into 3370 5 times, leaving a remainder of 305.
The next digit of our result is 5. 
Result so far: 1325.0
Deduct 3065 from 3370 and we're left with 305.
Bring next digit (1) of the dividend behind the 305 and repeat the process: 3051 / 613

Advancing to step 7:
613 can be fit into 3051 4 times, resulting in a remainder of 599.
Record the quotient 4 as the next digit in the result. 
Result so far: 13254.0
If we subtract 2452 from 3051, we get 599.
Include the next digit (0) from the dividend after 599, then repeat: 5990 / 613

Advancing to step 8:
613 can be fit into 5990 9 times, resulting in a remainder of 473.
The number 9 becomes the next digit in our result. 
Result so far: 132549.0
If we subtract 5517 from 5990, we get 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Going ahead to step 9:
If we divide 4730 by 613, we get 7 and a remainder of 439.
Record the quotient 7 as the next digit in the result. 
Result so far: 132549.7
The remainder is 439 after subtracting 4291 from 4730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Moving on to step 10:
The number 613 fits into 4390 7 times, leaving a remainder of 99.
Use 7 as the next digit of our solution. 
Result so far: 132549.77
Subtract 4291 from 4390 to get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

The final result is 132549.77 with a remainder of 0.099.