602250 ÷ 31 
The aim is to understand the frequency of 31 in 602250.

Step 1:
When dividing 6 by 31, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 31

Moving on to step 2:
The number 31 fits into 60 1 times, leaving a remainder of 29.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 31 from 60 and we're left with 29.
Take the next digit (2) from the dividend and append it to 29, then repeat: 292 / 31

Moving on to step 3:
When dividing 292 by 31, we get 9 with a remainder of 13.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 279 from 292 to get 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 31

Moving on to step 4:
132 divided by 31 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 194.0
Deduct 124 from 132 and we're left with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 31

Advancing to step 5:
31 can be fit into 85 2 times, resulting in a remainder of 23.
Write down 2 as next digit of the result. 
Result so far: 1942.0
Subtracting 62 from 85 leaves us with 23.
Include the next digit (0) from the dividend after 23, then repeat: 230 / 31

Advancing to step 6:
When dividing 230 by 31, we get 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 19427.0
Deduct 217 from 230 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
The number 31 fits into 130 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 19427.4
If we take 124 away from 130, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
When dividing 60 by 31, we get 1 with a remainder of 29.
The next digit of our result is 1. 
Result so far: 19427.41
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.

Going ahead to step 9:
The number 31 fits into 290 9 times, leaving a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 19427.419
Subtract 279 from 290 to get 11.
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 10:
31 can be fit into 110 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 19427.4193
Subtracting 93 from 110 leaves us 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.

Going ahead to step 11:
31 can be fit into 170 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 19427.41935
Deduct 155 from 170 and we're left 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.

Step 12:
If we divide 150 by 31, we get 4 and a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 19427.419354
Subtract 124 from 150 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.

Moving on to step 13:
260 divided by 31 is 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 19427.4193548
Subtracting 248 from 260 leaves us with 12.
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 14:
When dividing 120 by 31, we get 3 with a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 19427.41935483
If we subtract 93 from 120, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

After the division, we end up with 19427.41935483 and a remainder of 2.7e-08.