286423 ÷ 31 
The aim is to understand the frequency of 31 in 286423.

On to step 1:
When dividing 2 by 31, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 31

Going ahead to step 2:
If we divide 28 by 31, we get 0 and a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Grab the next digit (6) from the dividend, add it to 28, then carry on: 286 / 31

Going ahead to step 3:
When dividing 286 by 31, we get 9 with a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 279 from 286 to get 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 31

Let's proceed to step 4:
31 goes into 74 2 times with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 92.0
The remainder is 12 after subtracting 62 from 74.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 31

Going ahead to step 5:
The number 31 fits into 122 3 times, leaving a remainder of 29.
Put 3 as the next digit of the answer. 
Result so far: 923.0
The remainder is 29 after subtracting 93 from 122.
Take the next digit (3) from the dividend and append it to 29, then repeat: 293 / 31

On to step 6:
When dividing 293 by 31, we get 9 with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 9239.0
The remainder is 14 after subtracting 279 from 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 7:
The number 31 fits into 140 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 9239.4
The remainder is 16 after subtracting 124 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 8:
The number 31 fits into 160 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 9239.45
If we subtract 155 from 160, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
When dividing 50 by 31, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 9239.451
Subtracting 31 from 50 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
190 divided by 31 is 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 9239.4516
Subtracting 186 from 190 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 11:
31 goes into 40 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 9239.45161
If we take 31 away from 40, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 12:
90 divided by 31 is 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 9239.451612
If we take 62 away from 90, we end up 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.

Moving on to step 13:
If we divide 280 by 31, we get 9 and a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 9239.4516129
The remainder is 1 after subtracting 279 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 14:
10 divided by 31 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 9239.4516129
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.

After the division, we end up with 9239.4516129 and a remainder of 1e-08.