We divide 13680555 by 823
The aim is to understand the frequency of 823 in 13680555.

Moving on to step 1:
When dividing 1 by 823, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 823

Going ahead to step 2:
The number 823 fits into 13 0 times, leaving a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 823

Going ahead to step 3:
The number 823 fits into 136 0 times, leaving a remainder of 136.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 136, we end up with 136.
Fetch the next digit (8) from the dividend, attach it to 136 and continue: 1368 / 823

Let's proceed to step 4:
823 can be fit into 1368 1 times, resulting in a remainder of 545.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 823 from 1368 to get 545.
Bring next digit (0) of the dividend behind the 545 and repeat the process: 5450 / 823

Step 5:
823 can be fit into 5450 6 times, resulting in a remainder of 512.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we take 4938 away from 5450, we end up with 512.
Bring next digit (5) of the dividend behind the 512 and repeat the process: 5125 / 823

Let's proceed to step 6:
If we divide 5125 by 823, we get 6 and a remainder of 187.
The next digit of our result is 6. 
Result so far: 166.0
Subtracting 4938 from 5125 leaves us with 187.
Grab the next digit (5) from the dividend, add it to 187, then carry on: 1875 / 823

Advancing to step 7:
If we divide 1875 by 823, we get 2 and a remainder of 229.
The number 2 becomes the next digit in our result. 
Result so far: 1662.0
If we take 1646 away from 1875, we end up with 229.
Include the next digit (5) from the dividend after 229, then repeat: 2295 / 823

Going ahead to step 8:
823 can be fit into 2295 2 times, resulting in a remainder of 649.
Write down 2 as next digit of the result. 
Result so far: 16622.0
If we take 1646 away from 2295, we end up with 649.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6490, and continue the process.

Going ahead to step 9:
6490 divided by 823 is 7 with a remainder of 729.
Put 7 as the next digit of the answer. 
Result so far: 16622.7
Deduct 5761 from 6490 and we're left with 729.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7290, and continue the process.

Moving on to step 10:
If we divide 7290 by 823, we get 8 and a remainder of 706.
Put 8 as the next digit of the answer. 
Result so far: 16622.78
The remainder is 706 after subtracting 6584 from 7290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7060, and continue the process.

Moving on to step 11:
823 goes into 7060 8 times with a remainder of 476.
The number 8 becomes the next digit in our result. 
Result so far: 16622.788
Deduct 6584 from 7060 and we're left with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

After the division, we end up with 16622.788 and a remainder of 0.0476.