We're dividing 663588 by 73 
The aim is to understand the frequency of 73 in 663588.

Moving on to step 1:
73 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 73

Step 2:
If we divide 66 by 73, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 73

Moving on to step 3:
73 can be fit into 663 9 times, resulting in a remainder of 6.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 657 from 663 and we're left with 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 73

Advancing to step 4:
65 divided by 73 is 0 with a remainder of 65.
Write down 0 as next digit of the result. 
Result so far: 90.0
If we subtract 0 from 65, we get 65.
Bring next digit (8) of the dividend behind the 65 and repeat the process: 658 / 73

Advancing to step 5:
When dividing 658 by 73, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 909.0
If we take 657 away from 658, we end up with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 73

On to step 6:
18 divided by 73 is 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 9090.0
If we take 0 away from 18, 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.

Let's proceed to step 7:
180 divided by 73 is 2 with a remainder of 34.
Record the quotient 2 as the next digit in the result. 
Result so far: 9090.2
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.

Going ahead to 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: 9090.24
The remainder is 48 after subtracting 292 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 9:
When dividing 480 by 73, we get 6 with a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 9090.246
If we take 438 away from 480, we end up 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.

Step 10:
When dividing 420 by 73, we get 5 with a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 9090.2465
If we take 365 away from 420, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 11:
73 can be fit into 550 7 times, resulting in a remainder of 39.
Write down 7 as next digit of the result. 
Result so far: 9090.24657
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.

Advancing to step 12:
73 can be fit into 390 5 times, resulting in a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 9090.246575
Subtract 365 from 390 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 13:
250 divided by 73 is 3 with a remainder of 31.
The number 3 becomes the next digit in our result. 
Result so far: 9090.2465753
If we subtract 219 from 250, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 14:
73 goes into 310 4 times with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 9090.24657534
The remainder is 18 after subtracting 292 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 9090.24657534 and a remainder of 1.8e-08.