66724 divided by 31 
The aim is to understand the frequency of 31 in 66724.

Going ahead to 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.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 31

Step 2:
The number 31 fits into 66 2 times, leaving a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 62 from 66, we get 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 31

Going ahead to step 3:
31 goes into 47 1 times with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 21.0
If we take 31 away from 47, we end up with 16.
Fetch the next digit (2) from the dividend, attach it to 16 and continue: 162 / 31

Step 4:
31 goes into 162 5 times with a remainder of 7.
Write down 5 as next digit of the result. 
Result so far: 215.0
The remainder is 7 after subtracting 155 from 162.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 31

Going ahead to step 5:
74 divided by 31 is 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 2152.0
If we take 62 away from 74, we end up 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.

Step 6:
120 divided by 31 is 3 with a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 2152.3
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.

Going ahead to step 7:
31 can be fit into 270 8 times, resulting in a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 2152.38
Subtract 248 from 270 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 8:
When dividing 220 by 31, we get 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 2152.387
Subtracting 217 from 220 leaves us 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.

On to step 9:
30 divided by 31 is 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 2152.387
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 10:
The number 31 fits into 300 9 times, leaving a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 2152.38709
Deduct 279 from 300 and we're left 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.

Going ahead to step 11:
When dividing 210 by 31, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 2152.387096
If we take 186 away from 210, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 12:
The number 31 fits into 240 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 2152.3870967
Subtracting 217 from 240 leaves us with 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 13:
31 can be fit into 230 7 times, resulting in a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 2152.38709677
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.

After the division, we end up with 2152.38709677 and a remainder of 1.3e-08.