We look at the division of 615107 by 72 
The aim is to understand the frequency of 72 in 615107.

Going ahead to step 1:
72 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 72

Moving on to step 2:
If we divide 61 by 72, we get 0 and a remainder of 61.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 61 leaves us with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 72

Moving on to step 3:
72 goes into 615 8 times with a remainder of 39.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 576 from 615 leaves us with 39.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 72

On to step 4:
When dividing 391 by 72, we get 5 with a remainder of 31.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
The remainder is 31 after subtracting 360 from 391.
Take the next digit (0) from the dividend and append it to 31, then repeat: 310 / 72

Let's proceed to step 5:
310 divided by 72 is 4 with a remainder of 22.
Record the quotient 4 as the next digit in the result. 
Result so far: 854.0
If we take 288 away from 310, we end up with 22.
Append the next digit (7) from the dividend to 22 and continue with: 227 / 72

Going ahead to step 6:
72 goes into 227 3 times with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 8543.0
If we take 216 away from 227, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
72 can be fit into 110 1 times, resulting in a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 8543.1
If we subtract 72 from 110, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
72 can be fit into 380 5 times, resulting in a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 8543.15
Subtract 360 from 380 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
If we divide 200 by 72, we get 2 and a remainder of 56.
Put 2 as the next digit of the answer. 
Result so far: 8543.152
Subtract 144 from 200 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 10:
The number 72 fits into 560 7 times, leaving a remainder of 56.
Use 7 as the next digit of our solution. 
Result so far: 8543.1527
The remainder is 56 after subtracting 504 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 11:
72 can be fit into 560 7 times, resulting in a remainder of 56.
Use 7 as the next digit of our solution. 
Result so far: 8543.15277
Deduct 504 from 560 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

After the division, we end up with 8543.15277 and a remainder of 5.6e-05.