We're dividing 83322820 by 420 
The aim is to understand the frequency of 420 in 83322820.

On to step 1:
420 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 420

Moving on to step 2:
When dividing 83 by 420, we get 0 with a remainder of 83.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Append the next digit (3) from the dividend to 83 and continue with: 833 / 420

Moving on to step 3:
420 goes into 833 1 times with a remainder of 413.
The next digit of our result is 1. 
Result so far: 1.0
If we take 420 away from 833, we end up with 413.
Include the next digit (2) from the dividend after 413, then repeat: 4132 / 420

Moving on to step 4:
420 goes into 4132 9 times with a remainder of 352.
The next digit of our result is 9. 
Result so far: 19.0
If we take 3780 away from 4132, we end up with 352.
Grab the next digit (2) from the dividend, add it to 352, then carry on: 3522 / 420

Going ahead to step 5:
420 goes into 3522 8 times with a remainder of 162.
The number 8 becomes the next digit in our result. 
Result so far: 198.0
If we take 3360 away from 3522, we end up with 162.
Include the next digit (8) from the dividend after 162, then repeat: 1628 / 420

Advancing to step 6:
The number 420 fits into 1628 3 times, leaving a remainder of 368.
Use 3 as the next digit of our solution. 
Result so far: 1983.0
Subtracting 1260 from 1628 leaves us with 368.
Fetch the next digit (2) from the dividend, attach it to 368 and continue: 3682 / 420

Let's proceed to step 7:
When dividing 3682 by 420, we get 8 with a remainder of 322.
The number 8 becomes the next digit in our result. 
Result so far: 19838.0
Deduct 3360 from 3682 and we're left with 322.
Include the next digit (0) from the dividend after 322, then repeat: 3220 / 420

Advancing to step 8:
If we divide 3220 by 420, we get 7 and a remainder of 280.
Use 7 as the next digit of our solution. 
Result so far: 198387.0
The remainder is 280 after subtracting 2940 from 3220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 9:
If we divide 2800 by 420, we get 6 and a remainder of 280.
Put 6 as the next digit of the answer. 
Result so far: 198387.6
Subtracting 2520 from 2800 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 10:
If we divide 2800 by 420, we get 6 and a remainder of 280.
Write down 6 as next digit of the result. 
Result so far: 198387.66
If we take 2520 away from 2800, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Our division results in 198387.66 with a remaining 0.28.