We look at the division of 772151 by 15 
The aim is to understand the frequency of 15 in 772151.

Let's proceed to step 1:
7 divided by 15 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 15

Let's proceed to step 2:
When dividing 77 by 15, we get 5 with a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 75 from 77 to get 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 15

On to step 3:
15 can be fit into 22 1 times, resulting in a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
If we subtract 15 from 22, we get 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 15

Advancing to step 4:
71 divided by 15 is 4 with a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 514.0
If we take 60 away from 71, we end up with 11.
Take the next digit (5) from the dividend and append it to 11, then repeat: 115 / 15

Let's proceed to step 5:
If we divide 115 by 15, we get 7 and a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 5147.0
The remainder is 10 after subtracting 105 from 115.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 15

Advancing to step 6:
The number 15 fits into 101 6 times, leaving a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 51476.0
If we take 90 away from 101, 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.

Advancing to step 7:
When dividing 110 by 15, we get 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 51476.7
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 51476.73
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
15 goes into 50 3 times with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 51476.733
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

In conclusion, the division gives 51476.733 with a balance of 0.0005.