We're dividing 433237 by 31 
The aim is to understand the frequency of 31 in 433237.

Going ahead to step 1:
The number 31 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 31

Moving on to step 2:
31 can be fit into 43 1 times, resulting in a remainder of 12.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 31 from 43, we get 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 31

Step 3:
31 goes into 123 3 times with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 13.0
Deduct 93 from 123 and we're left with 30.
Append the next digit (2) from the dividend to 30 and continue with: 302 / 31

On to step 4:
If we divide 302 by 31, we get 9 and a remainder of 23.
Use 9 as the next digit of our solution. 
Result so far: 139.0
Subtract 279 from 302 to get 23.
Include the next digit (3) from the dividend after 23, then repeat: 233 / 31

Let's proceed to step 5:
The number 31 fits into 233 7 times, leaving a remainder of 16.
The next digit of our result is 7. 
Result so far: 1397.0
Subtracting 217 from 233 leaves us with 16.
Include the next digit (7) from the dividend after 16, then repeat: 167 / 31

Advancing to step 6:
167 divided by 31 is 5 with a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 13975.0
Deduct 155 from 167 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
31 goes into 120 3 times with a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 13975.3
If we take 93 away from 120, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 8:
31 can be fit into 270 8 times, resulting in a remainder of 22.
The next digit of our result is 8. 
Result so far: 13975.38
The remainder is 22 after subtracting 248 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 9:
31 can be fit into 220 7 times, resulting in a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 13975.387
If we take 217 away from 220, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
The number 31 fits into 30 0 times, leaving a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 13975.387
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
31 goes into 300 9 times with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 13975.38709
Deduct 279 from 300 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 12:
If we divide 210 by 31, we get 6 and a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 13975.387096
If we take 186 away from 210, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 13:
When dividing 240 by 31, we get 7 with a remainder of 23.
The next digit of our result is 7. 
Result so far: 13975.3870967
Deduct 217 from 240 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 14:
The number 31 fits into 230 7 times, leaving a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 13975.38709677
Subtract 217 from 230 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final outcome is 13975.38709677, with a leftover of 1.3e-08.