We look at the division of 218215 by 73 
The aim is to understand the frequency of 73 in 218215.

Let's proceed to step 1:
If we divide 2 by 73, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 73

Moving on to step 2:
73 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Bring next digit (8) of the dividend behind the 21 and repeat the process: 218 / 73

On to step 3:
73 goes into 218 2 times with a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 146 from 218 to get 72.
Fetch the next digit (2) from the dividend, attach it to 72 and continue: 722 / 73

Let's proceed to step 4:
When dividing 722 by 73, we get 9 with a remainder of 65.
The next digit of our result is 9. 
Result so far: 29.0
The remainder is 65 after subtracting 657 from 722.
Bring next digit (1) of the dividend behind the 65 and repeat the process: 651 / 73

Let's proceed to step 5:
When dividing 651 by 73, we get 8 with a remainder of 67.
Record the quotient 8 as the next digit in the result. 
Result so far: 298.0
If we subtract 584 from 651, we get 67.
Include the next digit (5) from the dividend after 67, then repeat: 675 / 73

Moving on to step 6:
When dividing 675 by 73, we get 9 with a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 2989.0
If we take 657 away from 675, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 7:
If we divide 180 by 73, we get 2 and a remainder of 34.
Write down 2 as next digit of the result. 
Result so far: 2989.2
The remainder is 34 after subtracting 146 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 8:
If we divide 340 by 73, we get 4 and a remainder of 48.
Write down 4 as next digit of the result. 
Result so far: 2989.24
If we subtract 292 from 340, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 9:
If we divide 480 by 73, we get 6 and a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 2989.246
Subtracting 438 from 480 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 10:
When dividing 420 by 73, we get 5 with a remainder of 55.
The next digit of our result is 5. 
Result so far: 2989.2465
Subtract 365 from 420 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 11:
When dividing 550 by 73, we get 7 with a remainder of 39.
The next digit of our result is 7. 
Result so far: 2989.24657
Subtract 511 from 550 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 12:
73 goes into 390 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 2989.246575
The remainder is 25 after subtracting 365 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 13:
The number 73 fits into 250 3 times, leaving a remainder of 31.
Record the quotient 3 as the next digit in the result. 
Result so far: 2989.2465753
Subtracting 219 from 250 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 14:
The number 73 fits into 310 4 times, leaving a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 2989.24657534
Subtracting 292 from 310 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 2989.24657534, with a leftover of 1.8e-08.