Let's divide 76824809 by 420
The aim is to understand the frequency of 420 in 76824809.

Going ahead to step 1:
The number 420 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 420

Let's proceed to step 2:
The number 420 fits into 76 0 times, leaving a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Include the next digit (8) from the dividend after 76, then repeat: 768 / 420

Moving on to step 3:
420 can be fit into 768 1 times, resulting in a remainder of 348.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 420 from 768 to get 348.
Append the next digit (2) from the dividend to 348 and continue with: 3482 / 420

Moving on to step 4:
When dividing 3482 by 420, we get 8 with a remainder of 122.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we subtract 3360 from 3482, we get 122.
Bring next digit (4) of the dividend behind the 122 and repeat the process: 1224 / 420

Going ahead to step 5:
When dividing 1224 by 420, we get 2 with a remainder of 384.
Write down 2 as next digit of the result. 
Result so far: 182.0
If we subtract 840 from 1224, we get 384.
Take the next digit (8) from the dividend and append it to 384, then repeat: 3848 / 420

Advancing to step 6:
420 goes into 3848 9 times with a remainder of 68.
Record the quotient 9 as the next digit in the result. 
Result so far: 1829.0
If we subtract 3780 from 3848, we get 68.
Fetch the next digit (0) from the dividend, attach it to 68 and continue: 680 / 420

Let's proceed to step 7:
The number 420 fits into 680 1 times, leaving a remainder of 260.
The next digit of our result is 1. 
Result so far: 18291.0
Subtracting 420 from 680 leaves us with 260.
Fetch the next digit (9) from the dividend, attach it to 260 and continue: 2609 / 420

Moving on to step 8:
420 can be fit into 2609 6 times, resulting in a remainder of 89.
Use 6 as the next digit of our solution. 
Result so far: 182916.0
The remainder is 89 after subtracting 2520 from 2609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 9:
890 divided by 420 is 2 with a remainder of 50.
Use 2 as the next digit of our solution. 
Result so far: 182916.2
Subtract 840 from 890 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 10:
If we divide 500 by 420, we get 1 and a remainder of 80.
Put 1 as the next digit of the answer. 
Result so far: 182916.21
If we take 420 away from 500, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 11:
420 goes into 800 1 times with a remainder of 380.
Record the quotient 1 as the next digit in the result. 
Result so far: 182916.211
Subtracting 420 from 800 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

After the division, we end up with 182916.211 and a remainder of 0.038.