665172 ÷ 3 
The aim is to understand the frequency of 3 in 665172.

On to step 1:
When dividing 6 by 3, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 6 from 6 leaves us with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 3

Advancing to step 2:
The number 3 fits into 6 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we take 6 away from 6, we end up with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 3

On to step 3:
5 divided by 3 is 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 221.0
The remainder is 2 after subtracting 3 from 5.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 3

Moving on to step 4:
When dividing 21 by 3, we get 7 with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 2217.0
Subtract 21 from 21 to get 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 3

Let's proceed to step 5:
3 goes into 7 2 times with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 22172.0
The remainder is 1 after subtracting 6 from 7.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 3

Step 6:
When dividing 12 by 3, we get 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 221724.0
Subtract 12 from 12 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 7:
If we divide 0 by 3, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 221724.0
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 8:
If we divide 0 by 3, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 221724.0
Subtract 0 from 0 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.

The quotient of the division is 221724.0, and the remainder is 0.0.