We look at the division of 47405621 by 823 
The aim is to understand the frequency of 823 in 47405621.

On to step 1:
4 divided by 823 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 823

Let's proceed to step 2:
47 divided by 823 is 0 with a remainder of 47.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 47, we get 47.
Bring next digit (4) of the dividend behind the 47 and repeat the process: 474 / 823

Advancing to step 3:
When dividing 474 by 823, we get 0 with a remainder of 474.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 474 and we're left with 474.
Append the next digit (0) from the dividend to 474 and continue with: 4740 / 823

Let's proceed to step 4:
4740 divided by 823 is 5 with a remainder of 625.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 4115 away from 4740, we end up with 625.
Grab the next digit (5) from the dividend, add it to 625, then carry on: 6255 / 823

On to step 5:
When dividing 6255 by 823, we get 7 with a remainder of 494.
The number 7 becomes the next digit in our result. 
Result so far: 57.0
Subtracting 5761 from 6255 leaves us with 494.
Grab the next digit (6) from the dividend, add it to 494, then carry on: 4946 / 823

Moving on to step 6:
When dividing 4946 by 823, we get 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 576.0
Deduct 4938 from 4946 and we're left with 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 823

Step 7:
When dividing 82 by 823, we get 0 with a remainder of 82.
Use 0 as the next digit of our solution. 
Result so far: 5760.0
The remainder is 82 after subtracting 0 from 82.
Include the next digit (1) from the dividend after 82, then repeat: 821 / 823

Step 8:
When dividing 821 by 823, we get 0 with a remainder of 821.
Use 0 as the next digit of our solution. 
Result so far: 57600.0
If we take 0 away from 821, we end up with 821.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8210, and continue the process.

On to step 9:
823 can be fit into 8210 9 times, resulting in a remainder of 803.
Use 9 as the next digit of our solution. 
Result so far: 57600.9
Deduct 7407 from 8210 and we're left with 803.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8030, and continue the process.

Going ahead to step 10:
823 goes into 8030 9 times with a remainder of 623.
The next digit of our result is 9. 
Result so far: 57600.99
The remainder is 623 after subtracting 7407 from 8030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

After the division, we end up with 57600.99 and a remainder of 0.623.