673542 ÷ 15 
The aim is to understand the frequency of 15 in 673542.

Going ahead to step 1:
15 goes into 6 0 times with 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 (7) of the dividend behind the 6 and repeat the process: 67 / 15

On to step 2:
When dividing 67 by 15, we get 4 with a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 60 away from 67, we end up with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 15

Moving on to step 3:
73 divided by 15 is 4 with a remainder of 13.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
Subtracting 60 from 73 leaves us with 13.
Include the next digit (5) from the dividend after 13, then repeat: 135 / 15

On to step 4:
135 divided by 15 is 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 449.0
Deduct 135 from 135 and we're left with 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 15

Going ahead to step 5:
15 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 4490.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 15

Advancing to step 6:
42 divided by 15 is 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 44902.0
Deduct 30 from 42 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.

Step 7:
15 can be fit into 120 8 times, resulting in a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 44902.8
If we subtract 120 from 120, 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.

Moving on to step 8:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 44902.8
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.

Going ahead to step 9:
The number 15 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 44902.8
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 44902.8 with a remainder of 0.0.