We're dividing 439763 by 31 
The aim is to understand the frequency of 31 in 439763.

Step 1:
If we divide 4 by 31, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 31

Going ahead to step 2:
31 goes into 43 1 times with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 31 away from 43, we end up with 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 31

Moving on to step 3:
31 can be fit into 129 4 times, resulting in a remainder of 5.
The next digit of our result is 4. 
Result so far: 14.0
Subtracting 124 from 129 leaves us with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 31

On to step 4:
31 goes into 57 1 times with a remainder of 26.
The number 1 becomes the next digit in our result. 
Result so far: 141.0
If we subtract 31 from 57, we get 26.
Grab the next digit (6) from the dividend, add it to 26, then carry on: 266 / 31

Moving on to step 5:
266 divided by 31 is 8 with a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 1418.0
Deduct 248 from 266 and we're left with 18.
Fetch the next digit (3) from the dividend, attach it to 18 and continue: 183 / 31

Advancing to step 6:
The number 31 fits into 183 5 times, leaving a remainder of 28.
Put 5 as the next digit of the answer. 
Result so far: 14185.0
Subtracting 155 from 183 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 7:
When dividing 280 by 31, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 14185.9
If we subtract 279 from 280, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
31 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 14185.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
The number 31 fits into 100 3 times, leaving a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 14185.903
Subtract 93 from 100 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 10:
When dividing 70 by 31, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 14185.9032
Subtracting 62 from 70 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 11:
31 can be fit into 80 2 times, resulting in a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 14185.90322
If we take 62 away from 80, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 14185.90322 with a remaining 1.8e-05.