74321171 divided by 809 
The aim is to understand the frequency of 809 in 74321171.

Step 1:
If we divide 7 by 809, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 809

Step 2:
The number 809 fits into 74 0 times, leaving a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 74 leaves us with 74.
Take the next digit (3) from the dividend and append it to 74, then repeat: 743 / 809

Going ahead to step 3:
If we divide 743 by 809, we get 0 and a remainder of 743.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 743 after subtracting 0 from 743.
Fetch the next digit (2) from the dividend, attach it to 743 and continue: 7432 / 809

Moving on to step 4:
If we divide 7432 by 809, we get 9 and a remainder of 151.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 7281 from 7432, we get 151.
Take the next digit (1) from the dividend and append it to 151, then repeat: 1511 / 809

Advancing to step 5:
If we divide 1511 by 809, we get 1 and a remainder of 702.
Write down 1 as next digit of the result. 
Result so far: 91.0
If we take 809 away from 1511, we end up with 702.
Include the next digit (1) from the dividend after 702, then repeat: 7021 / 809

On to step 6:
If we divide 7021 by 809, we get 8 and a remainder of 549.
The number 8 becomes the next digit in our result. 
Result so far: 918.0
Subtracting 6472 from 7021 leaves us with 549.
Bring next digit (7) of the dividend behind the 549 and repeat the process: 5497 / 809

Going ahead to step 7:
The number 809 fits into 5497 6 times, leaving a remainder of 643.
Write down 6 as next digit of the result. 
Result so far: 9186.0
If we subtract 4854 from 5497, we get 643.
Fetch the next digit (1) from the dividend, attach it to 643 and continue: 6431 / 809

Moving on to step 8:
809 goes into 6431 7 times with a remainder of 768.
Put 7 as the next digit of the answer. 
Result so far: 91867.0
Deduct 5663 from 6431 and we're left with 768.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7680, and continue the process.

Advancing to step 9:
809 goes into 7680 9 times with a remainder of 399.
Put 9 as the next digit of the answer. 
Result so far: 91867.9
If we take 7281 away from 7680, we end up with 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Going ahead to step 10:
809 goes into 3990 4 times with a remainder of 754.
Record the quotient 4 as the next digit in the result. 
Result so far: 91867.94
The remainder is 754 after subtracting 3236 from 3990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7540, and continue the process.

Let's proceed to step 11:
7540 divided by 809 is 9 with a remainder of 259.
Use 9 as the next digit of our solution. 
Result so far: 91867.949
If we subtract 7281 from 7540, we get 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Going ahead to step 12:
When dividing 2590 by 809, we get 3 with a remainder of 163.
The number 3 becomes the next digit in our result. 
Result so far: 91867.9493
If we subtract 2427 from 2590, 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.

Let's proceed to step 13:
The number 809 fits into 1630 2 times, leaving a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 91867.94932
If we take 1618 away from 1630, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 14:
The number 809 fits into 120 0 times, leaving a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 91867.94932
If we subtract 0 from 120, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 15:
When dividing 1200 by 809, we get 1 with a remainder of 391.
Use 1 as the next digit of our solution. 
Result so far: 91867.9493201
If we subtract 809 from 1200, we get 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Let's proceed to step 16:
809 goes into 3910 4 times with a remainder of 674.
Write down 4 as next digit of the result. 
Result so far: 91867.94932014
Deduct 3236 from 3910 and we're left with 674.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6740, and continue the process.

The final outcome is 91867.94932014, with a leftover of 6.74e-07.