We look at the division of 818221 by 73 
The aim is to understand the frequency of 73 in 818221.

Advancing to step 1:
73 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 73

Going ahead to step 2:
73 can be fit into 81 1 times, resulting in a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 73 from 81, we get 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 73

Going ahead to step 3:
When dividing 88 by 73, we get 1 with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we subtract 73 from 88, we get 15.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 73

On to step 4:
When dividing 152 by 73, we get 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 112.0
If we take 146 away from 152, we end up with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 73

Moving on to step 5:
If we divide 62 by 73, we get 0 and a remainder of 62.
Write down 0 as next digit of the result. 
Result so far: 1120.0
If we take 0 away from 62, we end up with 62.
Take the next digit (1) from the dividend and append it to 62, then repeat: 621 / 73

Let's proceed to step 6:
73 goes into 621 8 times with a remainder of 37.
Put 8 as the next digit of the answer. 
Result so far: 11208.0
Subtract 584 from 621 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 7:
73 goes into 370 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 11208.5
Subtracting 365 from 370 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 8:
When dividing 50 by 73, we get 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 11208.5
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 9:
73 goes into 500 6 times with a remainder of 62.
Use 6 as the next digit of our solution. 
Result so far: 11208.506
Deduct 438 from 500 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 10:
73 goes into 620 8 times with a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 11208.5068
Subtracting 584 from 620 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
If we divide 360 by 73, we get 4 and a remainder of 68.
Write down 4 as next digit of the result. 
Result so far: 11208.50684
Subtracting 292 from 360 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 12:
When dividing 680 by 73, we get 9 with a remainder of 23.
The next digit of our result is 9. 
Result so far: 11208.506849
Subtract 657 from 680 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 13:
73 goes into 230 3 times with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 11208.5068493
Deduct 219 from 230 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 14:
The number 73 fits into 110 1 times, leaving a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 11208.50684931
Deduct 73 from 110 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Our division results in 11208.50684931 with a remaining 3.7e-08.