80824621 ÷ 429 
The aim is to understand the frequency of 429 in 80824621.

On to step 1:
429 can be fit into 8 0 times, resulting in 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.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 429

Moving on to step 2:
The number 429 fits into 80 0 times, leaving a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Fetch the next digit (8) from the dividend, attach it to 80 and continue: 808 / 429

Step 3:
429 can be fit into 808 1 times, resulting in a remainder of 379.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 379 after subtracting 429 from 808.
Take the next digit (2) from the dividend and append it to 379, then repeat: 3792 / 429

Let's proceed to step 4:
429 goes into 3792 8 times with a remainder of 360.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
The remainder is 360 after subtracting 3432 from 3792.
Bring next digit (4) of the dividend behind the 360 and repeat the process: 3604 / 429

Moving on to step 5:
429 can be fit into 3604 8 times, resulting in a remainder of 172.
The next digit of our result is 8. 
Result so far: 188.0
Deduct 3432 from 3604 and we're left with 172.
Append the next digit (6) from the dividend to 172 and continue with: 1726 / 429

On to step 6:
1726 divided by 429 is 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 1884.0
If we subtract 1716 from 1726, we get 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 429

Step 7:
If we divide 102 by 429, we get 0 and a remainder of 102.
Put 0 as the next digit of the answer. 
Result so far: 18840.0
Subtracting 0 from 102 leaves us with 102.
Include the next digit (1) from the dividend after 102, then repeat: 1021 / 429

Let's proceed to step 8:
The number 429 fits into 1021 2 times, leaving a remainder of 163.
Use 2 as the next digit of our solution. 
Result so far: 188402.0
If we subtract 858 from 1021, we get 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Advancing to step 9:
429 goes into 1630 3 times with a remainder of 343.
The next digit of our result is 3. 
Result so far: 188402.3
If we take 1287 away from 1630, we end up with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Going ahead to step 10:
3430 divided by 429 is 7 with a remainder of 427.
The number 7 becomes the next digit in our result. 
Result so far: 188402.37
Deduct 3003 from 3430 and we're left with 427.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4270, and continue the process.

Step 11:
When dividing 4270 by 429, we get 9 with a remainder of 409.
Use 9 as the next digit of our solution. 
Result so far: 188402.379
The remainder is 409 after subtracting 3861 from 4270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Step 12:
4090 divided by 429 is 9 with a remainder of 229.
Use 9 as the next digit of our solution. 
Result so far: 188402.3799
Deduct 3861 from 4090 and we're left with 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

The final outcome is 188402.3799, with a leftover of 0.00229.