747717 ÷ 15 
The aim is to understand the frequency of 15 in 747717.

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
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 15

Let's proceed to step 2:
If we divide 74 by 15, we get 4 and a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 60 from 74 leaves us with 14.
Bring next digit (7) of the dividend behind the 14 and repeat the process: 147 / 15

On to step 3:
15 goes into 147 9 times with a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
If we subtract 135 from 147, we get 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 15

On to step 4:
15 goes into 127 8 times with a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 498.0
Deduct 120 from 127 and we're left with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 15

Going ahead to step 5:
If we divide 71 by 15, we get 4 and a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 4984.0
If we take 60 away from 71, we end up with 11.
Bring next digit (7) of the dividend behind the 11 and repeat the process: 117 / 15

Going ahead to step 6:
The number 15 fits into 117 7 times, leaving a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 49847.0
Deduct 105 from 117 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
120 divided by 15 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 49847.8
Subtract 120 from 120 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 49847.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 49847.8
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 49847.8 with a remaining 0.0.