64684209 divided by 809 
The aim is to understand the frequency of 809 in 64684209.

Going ahead to step 1:
The number 809 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 809

Advancing to step 2:
64 divided by 809 is 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Take the next digit (6) from the dividend and append it to 64, then repeat: 646 / 809

Going ahead to step 3:
If we divide 646 by 809, we get 0 and a remainder of 646.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 646, we end up with 646.
Append the next digit (8) from the dividend to 646 and continue with: 6468 / 809

On to step 4:
6468 divided by 809 is 7 with a remainder of 805.
The next digit of our result is 7. 
Result so far: 7.0
If we take 5663 away from 6468, we end up with 805.
Bring next digit (4) of the dividend behind the 805 and repeat the process: 8054 / 809

On to step 5:
8054 divided by 809 is 9 with a remainder of 773.
Put 9 as the next digit of the answer. 
Result so far: 79.0
Subtract 7281 from 8054 to get 773.
Bring next digit (2) of the dividend behind the 773 and repeat the process: 7732 / 809

Let's proceed to step 6:
809 goes into 7732 9 times with a remainder of 451.
The next digit of our result is 9. 
Result so far: 799.0
If we subtract 7281 from 7732, we get 451.
Fetch the next digit (0) from the dividend, attach it to 451 and continue: 4510 / 809

Advancing to step 7:
809 can be fit into 4510 5 times, resulting in a remainder of 465.
The number 5 becomes the next digit in our result. 
Result so far: 7995.0
Subtracting 4045 from 4510 leaves us with 465.
Grab the next digit (9) from the dividend, add it to 465, then carry on: 4659 / 809

On to step 8:
When dividing 4659 by 809, we get 5 with a remainder of 614.
Record the quotient 5 as the next digit in the result. 
Result so far: 79955.0
Subtracting 4045 from 4659 leaves us with 614.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6140, and continue the process.

Let's proceed to step 9:
When dividing 6140 by 809, we get 7 with a remainder of 477.
The next digit of our result is 7. 
Result so far: 79955.7
If we subtract 5663 from 6140, we get 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Advancing to step 10:
The number 809 fits into 4770 5 times, leaving a remainder of 725.
The number 5 becomes the next digit in our result. 
Result so far: 79955.75
Subtracting 4045 from 4770 leaves us with 725.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7250, and continue the process.

Moving on to step 11:
809 can be fit into 7250 8 times, resulting in a remainder of 778.
Write down 8 as next digit of the result. 
Result so far: 79955.758
If we subtract 6472 from 7250, we get 778.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7780, and continue the process.

On to step 12:
7780 divided by 809 is 9 with a remainder of 499.
Put 9 as the next digit of the answer. 
Result so far: 79955.7589
If we take 7281 away from 7780, we end up with 499.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4990, and continue the process.

On to step 13:
809 goes into 4990 6 times with a remainder of 136.
Write down 6 as next digit of the result. 
Result so far: 79955.75896
The remainder is 136 after subtracting 4854 from 4990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 14:
1360 divided by 809 is 1 with a remainder of 551.
Record the quotient 1 as the next digit in the result. 
Result so far: 79955.758961
Subtract 809 from 1360 to get 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

Going ahead to step 15:
The number 809 fits into 5510 6 times, leaving a remainder of 656.
Put 6 as the next digit of the answer. 
Result so far: 79955.7589616
The remainder is 656 after subtracting 4854 from 5510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Going ahead to step 16:
When dividing 6560 by 809, we get 8 with a remainder of 88.
The next digit of our result is 8. 
Result so far: 79955.75896168
The remainder is 88 after subtracting 6472 from 6560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

The final outcome is 79955.75896168, with a leftover of 8.8e-08.