We look at the division of 921745 by 73 
The aim is to understand the frequency of 73 in 921745.

Going ahead to step 1:
The number 73 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 73

Moving on to step 2:
73 can be fit into 92 1 times, resulting in a remainder of 19.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 73 from 92, we get 19.
Grab the next digit (1) from the dividend, add it to 19, then carry on: 191 / 73

Let's proceed to step 3:
If we divide 191 by 73, we get 2 and a remainder of 45.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 146 from 191 to get 45.
Bring next digit (7) of the dividend behind the 45 and repeat the process: 457 / 73

On to step 4:
If we divide 457 by 73, we get 6 and a remainder of 19.
Write down 6 as next digit of the result. 
Result so far: 126.0
Subtract 438 from 457 to get 19.
Grab the next digit (4) from the dividend, add it to 19, then carry on: 194 / 73

Let's proceed to step 5:
The number 73 fits into 194 2 times, leaving a remainder of 48.
The next digit of our result is 2. 
Result so far: 1262.0
If we subtract 146 from 194, we get 48.
Grab the next digit (5) from the dividend, add it to 48, then carry on: 485 / 73

Moving on to step 6:
If we divide 485 by 73, we get 6 and a remainder of 47.
Write down 6 as next digit of the result. 
Result so far: 12626.0
The remainder is 47 after subtracting 438 from 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
If we divide 470 by 73, we get 6 and a remainder of 32.
Record the quotient 6 as the next digit in the result. 
Result so far: 12626.6
The remainder is 32 after subtracting 438 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 8:
73 can be fit into 320 4 times, resulting in a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 12626.64
Deduct 292 from 320 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 9:
280 divided by 73 is 3 with a remainder of 61.
The next digit of our result is 3. 
Result so far: 12626.643
Subtract 219 from 280 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 10:
610 divided by 73 is 8 with a remainder of 26.
Write down 8 as next digit of the result. 
Result so far: 12626.6438
Subtracting 584 from 610 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 11:
260 divided by 73 is 3 with a remainder of 41.
Put 3 as the next digit of the answer. 
Result so far: 12626.64383
Deduct 219 from 260 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 12:
73 goes into 410 5 times with a remainder of 45.
The next digit of our result is 5. 
Result so far: 12626.643835
If we subtract 365 from 410, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 13:
When dividing 450 by 73, we get 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 12626.6438356
Subtracting 438 from 450 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 14:
73 can be fit into 120 1 times, resulting in a remainder of 47.
Put 1 as the next digit of the answer. 
Result so far: 12626.64383561
Subtracting 73 from 120 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final outcome is 12626.64383561, with a leftover of 4.7e-08.