We're dividing 763727 by 15 
The aim is to understand the frequency of 15 in 763727.

Step 1:
When dividing 7 by 15, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 15

On to step 2:
The number 15 fits into 76 5 times, leaving a remainder of 1.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 75 from 76 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 15

Step 3:
If we divide 13 by 15, we get 0 and a remainder of 13.
The next digit of our result is 0. 
Result so far: 50.0
If we take 0 away from 13, we end up with 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 15

Step 4:
137 divided by 15 is 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 509.0
If we take 135 away from 137, we end up with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 15

Moving on to step 5:
When dividing 22 by 15, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 5091.0
If we take 15 away from 22, we end up with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 15

Let's proceed to step 6:
If we divide 77 by 15, we get 5 and a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 50915.0
If we take 75 away from 77, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
If we divide 20 by 15, we get 1 and a remainder of 5.
The next digit of our result is 1. 
Result so far: 50915.1
The remainder is 5 after subtracting 15 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 50915.13
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.

Advancing to step 9:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 50915.133
The remainder is 5 after subtracting 45 from 50.
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 50915.133, with a leftover of 0.0005.