Let's divide 872451 by 3
The aim is to understand the frequency of 3 in 872451.

Going ahead to step 1:
3 can be fit into 8 2 times, resulting in a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 6 from 8, we get 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 3

Advancing to step 2:
3 goes into 27 9 times with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 29.0
The remainder is 0 after subtracting 27 from 27.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 3

Let's proceed to step 3:
2 divided by 3 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 290.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 3

Advancing to step 4:
When dividing 24 by 3, we get 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 2908.0
Subtracting 24 from 24 leaves us with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 3

On to step 5:
5 divided by 3 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 29081.0
Subtracting 3 from 5 leaves us with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 3

Going ahead to step 6:
When dividing 21 by 3, we get 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 290817.0
Subtract 21 from 21 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.

On to step 7:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 290817.0
Deduct 0 from 0 and we're left 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.

On to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 290817.0
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.

Our division results in 290817.0 with a remaining 0.0.