143584 divided by 31 
The aim is to understand the frequency of 31 in 143584.

Let's proceed to step 1:
When dividing 1 by 31, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 31

Step 2:
If we divide 14 by 31, we get 0 and a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 14 leaves us with 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 31

Going ahead to step 3:
If we divide 143 by 31, we get 4 and a remainder of 19.
The next digit of our result is 4. 
Result so far: 4.0
If we take 124 away from 143, we end up with 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 31

Moving on to step 4:
If we divide 195 by 31, we get 6 and a remainder of 9.
The next digit of our result is 6. 
Result so far: 46.0
If we subtract 186 from 195, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 31

Let's proceed to step 5:
31 goes into 98 3 times with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 463.0
Subtract 93 from 98 to get 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 31

Step 6:
31 can be fit into 54 1 times, resulting in a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 4631.0
Subtract 31 from 54 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 7:
31 goes into 230 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 4631.7
If we subtract 217 from 230, we 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.

Let's proceed to step 8:
When dividing 130 by 31, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 4631.74
The remainder is 6 after subtracting 124 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 9:
The number 31 fits into 60 1 times, leaving a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 4631.741
If we subtract 31 from 60, we 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.

On to step 10:
31 goes into 290 9 times with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 4631.7419
Deduct 279 from 290 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 11:
When dividing 110 by 31, we get 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 4631.74193
The remainder is 17 after subtracting 93 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 12:
31 goes into 170 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 4631.741935
Subtracting 155 from 170 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 13:
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: 4631.7419354
If we subtract 124 from 150, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 14:
31 can be fit into 260 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 4631.74193548
If we subtract 248 from 260, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 4631.74193548 with a remaining 1.2e-08.