531978 ÷ 73 
The aim is to understand the frequency of 73 in 531978.

Moving on to step 1:
If we divide 5 by 73, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 73

Advancing to step 2:
73 can be fit into 53 0 times, resulting in a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Include the next digit (1) from the dividend after 53, then repeat: 531 / 73

Moving on to step 3:
The number 73 fits into 531 7 times, leaving a remainder of 20.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 511 from 531, we get 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 73

Advancing to step 4:
When dividing 209 by 73, we get 2 with a remainder of 63.
Write down 2 as next digit of the result. 
Result so far: 72.0
If we take 146 away from 209, we end up with 63.
Include the next digit (7) from the dividend after 63, then repeat: 637 / 73

Moving on to step 5:
73 can be fit into 637 8 times, resulting in a remainder of 53.
Put 8 as the next digit of the answer. 
Result so far: 728.0
Deduct 584 from 637 and we're left with 53.
Take the next digit (8) from the dividend and append it to 53, then repeat: 538 / 73

On to step 6:
73 can be fit into 538 7 times, resulting in a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 7287.0
Subtract 511 from 538 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 7:
If we divide 270 by 73, we get 3 and a remainder of 51.
Use 3 as the next digit of our solution. 
Result so far: 7287.3
Subtracting 219 from 270 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 8:
When dividing 510 by 73, we get 6 with a remainder of 72.
Write down 6 as next digit of the result. 
Result so far: 7287.36
If we subtract 438 from 510, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 9:
If we divide 720 by 73, we get 9 and a remainder of 63.
The next digit of our result is 9. 
Result so far: 7287.369
Subtracting 657 from 720 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 10:
73 can be fit into 630 8 times, resulting in a remainder of 46.
The number 8 becomes the next digit in our result. 
Result so far: 7287.3698
Subtract 584 from 630 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 11:
460 divided by 73 is 6 with a remainder of 22.
The next digit of our result is 6. 
Result so far: 7287.36986
Subtract 438 from 460 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 12:
If we divide 220 by 73, we get 3 and a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 7287.369863
Deduct 219 from 220 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 13:
If we divide 10 by 73, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 7287.369863
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 14:
If we divide 100 by 73, we get 1 and a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 7287.36986301
If we subtract 73 from 100, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The final outcome is 7287.36986301, with a leftover of 2.7e-08.