We're dividing 172954 by 15 
The aim is to understand the frequency of 15 in 172954.

On to step 1:
If we divide 1 by 15, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 15

Advancing to step 2:
15 goes into 17 1 times with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 15 away from 17, we end up with 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 15

Advancing to step 3:
22 divided by 15 is 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 7 after subtracting 15 from 22.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 15

Step 4:
When dividing 79 by 15, we get 5 with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 115.0
If we take 75 away from 79, we end up with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 15

Let's proceed to step 5:
15 can be fit into 45 3 times, resulting in a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 1153.0
If we take 45 away from 45, we end up with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 15

Let's proceed to step 6:
When dividing 4 by 15, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 11530.0
Subtract 0 from 4 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
40 divided by 15 is 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 11530.2
Deduct 30 from 40 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
If we divide 100 by 15, we get 6 and a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 11530.26
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
100 divided by 15 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 11530.266
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 11530.266 and a remainder of 0.001.