664193 ÷ 73 
The aim is to understand the frequency of 73 in 664193.

Let's proceed to step 1:
If we divide 6 by 73, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 73

Going ahead to step 2:
If we divide 66 by 73, we get 0 and a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Include the next digit (4) from the dividend after 66, then repeat: 664 / 73

Going ahead to step 3:
664 divided by 73 is 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 657 from 664 and we're left with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 73

Moving on to step 4:
When dividing 71 by 73, we get 0 with a remainder of 71.
Write down 0 as next digit of the result. 
Result so far: 90.0
The remainder is 71 after subtracting 0 from 71.
Fetch the next digit (9) from the dividend, attach it to 71 and continue: 719 / 73

On to step 5:
719 divided by 73 is 9 with a remainder of 62.
Record the quotient 9 as the next digit in the result. 
Result so far: 909.0
The remainder is 62 after subtracting 657 from 719.
Grab the next digit (3) from the dividend, add it to 62, then carry on: 623 / 73

On to step 6:
73 goes into 623 8 times with a remainder of 39.
Use 8 as the next digit of our solution. 
Result so far: 9098.0
Subtracting 584 from 623 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 7:
The number 73 fits into 390 5 times, leaving a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 9098.5
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.

Step 8:
73 can be fit into 250 3 times, resulting in a remainder of 31.
Use 3 as the next digit of our solution. 
Result so far: 9098.53
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.

On to step 9:
73 goes into 310 4 times with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 9098.534
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.

Advancing to step 10:
If we divide 180 by 73, we get 2 and a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 9098.5342
If we take 146 away from 180, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
340 divided by 73 is 4 with a remainder of 48.
The next digit of our result is 4. 
Result so far: 9098.53424
Deduct 292 from 340 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 12:
73 goes into 480 6 times with a remainder of 42.
Write down 6 as next digit of the result. 
Result so far: 9098.534246
The remainder is 42 after subtracting 438 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 13:
73 goes into 420 5 times with a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 9098.5342465
The remainder is 55 after subtracting 365 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 14:
73 can be fit into 550 7 times, resulting in a remainder of 39.
The next digit of our result is 7. 
Result so far: 9098.53424657
If we subtract 511 from 550, we 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.

Our division results in 9098.53424657 with a remaining 3.9e-08.