210144 ÷ 31 
The aim is to understand the frequency of 31 in 210144.

Step 1:
When dividing 2 by 31, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 31

Advancing to step 2:
31 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 31

Going ahead to step 3:
31 can be fit into 210 6 times, resulting in a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 186 from 210 to get 24.
Bring next digit (1) of the dividend behind the 24 and repeat the process: 241 / 31

Going ahead to step 4:
If we divide 241 by 31, we get 7 and a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 67.0
Subtracting 217 from 241 leaves us with 24.
Bring next digit (4) of the dividend behind the 24 and repeat the process: 244 / 31

Advancing to step 5:
If we divide 244 by 31, we get 7 and a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 677.0
If we take 217 away from 244, we end up with 27.
Fetch the next digit (4) from the dividend, attach it to 27 and continue: 274 / 31

On to step 6:
The number 31 fits into 274 8 times, leaving a remainder of 26.
The number 8 becomes the next digit in our result. 
Result so far: 6778.0
Subtract 248 from 274 to 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.

Going ahead to step 7:
260 divided by 31 is 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 6778.8
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.

Going ahead to step 8:
The number 31 fits into 120 3 times, leaving a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 6778.83
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 9:
31 can be fit into 270 8 times, resulting in a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 6778.838
If we take 248 away from 270, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 10:
When dividing 220 by 31, we get 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 6778.8387
Deduct 217 from 220 and we're left 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.

Advancing to step 11:
The number 31 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 6778.8387
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
31 can be fit into 300 9 times, resulting in a remainder of 21.
The next digit of our result is 9. 
Result so far: 6778.838709
Subtracting 279 from 300 leaves us 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.

Let's proceed to step 13:
The number 31 fits into 210 6 times, leaving a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 6778.8387096
Subtract 186 from 210 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 14:
240 divided by 31 is 7 with a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 6778.83870967
If we subtract 217 from 240, we 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.

The final outcome is 6778.83870967, with a leftover of 2.3e-08.