We're dividing 724879 by 31 
The aim is to understand the frequency of 31 in 724879.

On to step 1:
If we divide 7 by 31, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 31

Going ahead to step 2:
When dividing 72 by 31, we get 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 62 from 72, we get 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 31

Let's proceed to step 3:
When dividing 104 by 31, we get 3 with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 23.0
Subtract 93 from 104 to get 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 31

Let's proceed to step 4:
The number 31 fits into 118 3 times, leaving a remainder of 25.
The number 3 becomes the next digit in our result. 
Result so far: 233.0
Subtracting 93 from 118 leaves us with 25.
Grab the next digit (7) from the dividend, add it to 25, then carry on: 257 / 31

On to step 5:
If we divide 257 by 31, we get 8 and a remainder of 9.
The next digit of our result is 8. 
Result so far: 2338.0
The remainder is 9 after subtracting 248 from 257.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 31

On to step 6:
31 goes into 99 3 times with a remainder of 6.
The next digit of our result is 3. 
Result so far: 23383.0
If we subtract 93 from 99, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
60 divided by 31 is 1 with a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 23383.1
Subtract 31 from 60 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 8:
31 goes into 290 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 23383.19
The remainder is 11 after subtracting 279 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 9:
110 divided by 31 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 23383.193
If we take 93 away from 110, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 10:
170 divided by 31 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 23383.1935
The remainder is 15 after subtracting 155 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 11:
31 can be fit into 150 4 times, resulting in a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 23383.19354
Deduct 124 from 150 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 12:
31 goes into 260 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 23383.193548
The remainder is 12 after subtracting 248 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
The number 31 fits into 120 3 times, leaving a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 23383.1935483
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.

Step 14:
When dividing 270 by 31, we get 8 with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 23383.19354838
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.

After the division, we end up with 23383.19354838 and a remainder of 2.2e-08.