We're dividing 78687475 by 820 
The aim is to understand the frequency of 820 in 78687475.

Advancing to step 1:
When dividing 7 by 820, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 820

Step 2:
78 divided by 820 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Fetch the next digit (6) from the dividend, attach it to 78 and continue: 786 / 820

On to step 3:
The number 820 fits into 786 0 times, leaving a remainder of 786.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 786 to get 786.
Take the next digit (8) from the dividend and append it to 786, then repeat: 7868 / 820

On to step 4:
820 can be fit into 7868 9 times, resulting in a remainder of 488.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 7380 from 7868 leaves us with 488.
Bring next digit (7) of the dividend behind the 488 and repeat the process: 4887 / 820

Moving on to step 5:
The number 820 fits into 4887 5 times, leaving a remainder of 787.
Use 5 as the next digit of our solution. 
Result so far: 95.0
The remainder is 787 after subtracting 4100 from 4887.
Take the next digit (4) from the dividend and append it to 787, then repeat: 7874 / 820

Moving on to step 6:
The number 820 fits into 7874 9 times, leaving a remainder of 494.
Record the quotient 9 as the next digit in the result. 
Result so far: 959.0
If we take 7380 away from 7874, we end up with 494.
Append the next digit (7) from the dividend to 494 and continue with: 4947 / 820

Going ahead to step 7:
The number 820 fits into 4947 6 times, leaving a remainder of 27.
Use 6 as the next digit of our solution. 
Result so far: 9596.0
The remainder is 27 after subtracting 4920 from 4947.
Fetch the next digit (5) from the dividend, attach it to 27 and continue: 275 / 820

Advancing to step 8:
When dividing 275 by 820, we get 0 with a remainder of 275.
Write down 0 as next digit of the result. 
Result so far: 95960.0
If we subtract 0 from 275, we get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 9:
820 goes into 2750 3 times with a remainder of 290.
The next digit of our result is 3. 
Result so far: 95960.3
Subtract 2460 from 2750 to get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Step 10:
If we divide 2900 by 820, we get 3 and a remainder of 440.
The next digit of our result is 3. 
Result so far: 95960.33
If we subtract 2460 from 2900, we get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

The final result is 95960.33 with a remainder of 0.44.