We look at the division of 809300 by 73 
The aim is to understand the frequency of 73 in 809300.

Advancing to step 1:
If we divide 8 by 73, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
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 / 73

Moving on to step 2:
73 goes into 80 1 times with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 73 from 80 and we're left with 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 73

Let's proceed to step 3:
The number 73 fits into 79 1 times, leaving a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Deduct 73 from 79 and we're left with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 73

On to step 4:
If we divide 63 by 73, we get 0 and a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 110.0
Deduct 0 from 63 and we're left with 63.
Fetch the next digit (0) from the dividend, attach it to 63 and continue: 630 / 73

Step 5:
When dividing 630 by 73, we get 8 with a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 1108.0
Deduct 584 from 630 and we're left with 46.
Take the next digit (0) from the dividend and append it to 46, then repeat: 460 / 73

On to step 6:
73 can be fit into 460 6 times, resulting in a remainder of 22.
The number 6 becomes the next digit in our result. 
Result so far: 11086.0
The remainder is 22 after subtracting 438 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
If we divide 220 by 73, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 11086.3
Subtracting 219 from 220 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 8:
If we divide 10 by 73, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 11086.3
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
73 can be fit into 100 1 times, resulting in a remainder of 27.
The next digit of our result is 1. 
Result so far: 11086.301
If we subtract 73 from 100, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 10:
73 can be fit into 270 3 times, resulting in a remainder of 51.
The number 3 becomes the next digit in our result. 
Result so far: 11086.3013
Deduct 219 from 270 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 11:
The number 73 fits into 510 6 times, leaving a remainder of 72.
Record the quotient 6 as the next digit in the result. 
Result so far: 11086.30136
The remainder is 72 after subtracting 438 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 12:
When dividing 720 by 73, we get 9 with a remainder of 63.
Write down 9 as next digit of the result. 
Result so far: 11086.301369
Deduct 657 from 720 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 13:
The number 73 fits into 630 8 times, leaving a remainder of 46.
Write down 8 as next digit of the result. 
Result so far: 11086.3013698
Deduct 584 from 630 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 14:
If we divide 460 by 73, we get 6 and a remainder of 22.
Put 6 as the next digit of the answer. 
Result so far: 11086.30136986
Subtracting 438 from 460 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final outcome is 11086.30136986, with a leftover of 2.2e-08.