We look at the division of 20171531 by 824 
The aim is to understand the frequency of 824 in 20171531.

On to step 1:
The number 824 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 824

Moving on to step 2:
The number 824 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 20, we get 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 824

Moving on to step 3:
The number 824 fits into 201 0 times, leaving a remainder of 201.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 201 to get 201.
Grab the next digit (7) from the dividend, add it to 201, then carry on: 2017 / 824

Let's proceed to step 4:
When dividing 2017 by 824, we get 2 with a remainder of 369.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1648 from 2017 and we're left with 369.
Append the next digit (1) from the dividend to 369 and continue with: 3691 / 824

On to step 5:
The number 824 fits into 3691 4 times, leaving a remainder of 395.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
If we subtract 3296 from 3691, we get 395.
Bring next digit (5) of the dividend behind the 395 and repeat the process: 3955 / 824

Advancing to step 6:
3955 divided by 824 is 4 with a remainder of 659.
Use 4 as the next digit of our solution. 
Result so far: 244.0
Deduct 3296 from 3955 and we're left with 659.
Bring next digit (3) of the dividend behind the 659 and repeat the process: 6593 / 824

On to step 7:
6593 divided by 824 is 8 with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 2448.0
If we subtract 6592 from 6593, we get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 824

Advancing to step 8:
If we divide 11 by 824, we get 0 and a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 24480.0
Deduct 0 from 11 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 9:
824 goes into 110 0 times with a remainder of 110.
Use 0 as the next digit of our solution. 
Result so far: 24480.0
If we take 0 away from 110, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 10:
824 goes into 1100 1 times with a remainder of 276.
The number 1 becomes the next digit in our result. 
Result so far: 24480.01
Subtracting 824 from 1100 leaves us with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Going ahead to step 11:
When dividing 2760 by 824, we get 3 with a remainder of 288.
Write down 3 as next digit of the result. 
Result so far: 24480.013
If we subtract 2472 from 2760, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 12:
The number 824 fits into 2880 3 times, leaving a remainder of 408.
The number 3 becomes the next digit in our result. 
Result so far: 24480.0133
Subtract 2472 from 2880 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

The quotient of the division is 24480.0133, and the remainder is 0.00408.