We look at the division of 775505 by 15 
The aim is to understand the frequency of 15 in 775505.

Let's proceed to step 1:
15 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 15

Step 2:
77 divided by 15 is 5 with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 75 from 77 leaves us with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 15

Let's proceed to step 3:
15 can be fit into 25 1 times, resulting in a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 51.0
If we take 15 away from 25, we end up with 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 15

Step 4:
When dividing 105 by 15, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 517.0
Subtracting 105 from 105 leaves us with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 15

Going ahead to step 5:
When dividing 0 by 15, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5170.0
Deduct 0 from 0 and we're left with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 15

Step 6:
If we divide 5 by 15, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 51700.0
Deduct 0 from 5 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.

Going ahead to step 7:
15 goes into 50 3 times with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 51700.3
Subtracting 45 from 50 leaves us 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.

Moving on to step 8:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 51700.33
If we take 45 away from 50, we end up 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.

The final outcome is 51700.33, with a leftover of 0.005.