646212 ÷ 5 
The aim is to understand the frequency of 5 in 646212.

Advancing to step 1:
When dividing 6 by 5, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 5 from 6 to get 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 5

Let's proceed to step 2:
The number 5 fits into 14 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 10 from 14 and we're left with 4.
Take the next digit (6) from the dividend and append it to 4, then repeat: 46 / 5

Advancing to step 3:
The number 5 fits into 46 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 129.0
If we take 45 away from 46, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 5

On to step 4:
The number 5 fits into 12 2 times, leaving a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 1292.0
If we take 10 away from 12, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 5

Let's proceed to step 5:
5 can be fit into 21 4 times, resulting in a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 12924.0
Subtracting 20 from 21 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 5

Moving on to step 6:
5 can be fit into 12 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 129242.0
If we take 10 away from 12, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
When dividing 20 by 5, we get 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 129242.4
Deduct 20 from 20 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.

Going ahead to step 8:
5 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 129242.4
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.

Let's proceed to step 9:
If we divide 0 by 5, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 129242.4
If we take 0 away from 0, we end up 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.

The final result is 129242.4 with a remainder of 0.0.