We divide 431545 by 4
The aim is to understand the frequency of 4 in 431545.

On to step 1:
When dividing 4 by 4, we get 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 4 from 4, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 4

Advancing to step 2:
4 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we subtract 0 from 3, we get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 4

Step 3:
The number 4 fits into 31 7 times, leaving a remainder of 3.
The next digit of our result is 7. 
Result so far: 107.0
Subtracting 28 from 31 leaves us with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 4

Advancing to step 4:
35 divided by 4 is 8 with a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 1078.0
Subtract 32 from 35 to get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 4

Step 5:
The number 4 fits into 34 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 10788.0
The remainder is 2 after subtracting 32 from 34.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 4

Going ahead to step 6:
The number 4 fits into 25 6 times, leaving a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 107886.0
Deduct 24 from 25 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
4 goes into 10 2 times with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 107886.2
Deduct 8 from 10 and we're left 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.

Advancing to step 8:
4 can be fit into 20 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 107886.25
Subtracting 20 from 20 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.

Moving on to step 9:
0 divided by 4 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 107886.25
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.

On to step 10:
4 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 107886.25
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.

The final result is 107886.25 with a remainder of 0.0.