637702 ÷ 31 
The aim is to understand the frequency of 31 in 637702.

Step 1:
31 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 31

Going ahead to step 2:
31 goes into 63 2 times with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 62 from 63 to get 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 31

Let's proceed to step 3:
The number 31 fits into 17 0 times, leaving a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 20.0
If we take 0 away from 17, we end up with 17.
Bring next digit (7) of the dividend behind the 17 and repeat the process: 177 / 31

On to step 4:
The number 31 fits into 177 5 times, leaving a remainder of 22.
The next digit of our result is 5. 
Result so far: 205.0
If we take 155 away from 177, we end up with 22.
Fetch the next digit (0) from the dividend, attach it to 22 and continue: 220 / 31

On to step 5:
When dividing 220 by 31, we get 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 2057.0
Deduct 217 from 220 and we're left with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 31

Going ahead to step 6:
The number 31 fits into 32 1 times, leaving a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 20571.0
Deduct 31 from 32 and we're left with 1.
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 7:
If we divide 10 by 31, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 20571.0
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.

Let's proceed to step 8:
The number 31 fits into 100 3 times, leaving a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 20571.03
If we subtract 93 from 100, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 9:
If we divide 70 by 31, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 20571.032
Subtract 62 from 70 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
The number 31 fits into 80 2 times, leaving a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 20571.0322
Subtract 62 from 80 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 20571.0322 and a remainder of 0.00018.