We look at the division of 431990 by 5 
The aim is to understand the frequency of 5 in 431990.

Let's proceed to step 1:
4 divided by 5 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 5

Let's proceed to step 2:
The number 5 fits into 43 8 times, leaving a remainder of 3.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 40 from 43 to get 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 5

Moving on to step 3:
When dividing 31 by 5, we get 6 with a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 86.0
If we subtract 30 from 31, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 5

Step 4:
5 can be fit into 19 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 863.0
Subtracting 15 from 19 leaves us with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 5

Going ahead to step 5:
If we divide 49 by 5, we get 9 and a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 8639.0
Subtract 45 from 49 to get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 5

Moving on to step 6:
When dividing 40 by 5, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 86398.0
If we take 40 away from 40, 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.

Advancing to step 7:
The number 5 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 86398.0
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.

Advancing to step 8:
5 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 86398.0
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.

After the division, we end up with 86398.0 and a remainder of 0.0.