We look at the division of 731973 by 3 
The aim is to understand the frequency of 3 in 731973.

Moving on to step 1:
When dividing 7 by 3, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 6 from 7 to get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 3

Advancing to step 2:
3 goes into 13 4 times with a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 24.0
Deduct 12 from 13 and we're left with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 3

Going ahead to step 3:
If we divide 11 by 3, we get 3 and a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 243.0
The remainder is 2 after subtracting 9 from 11.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 3

Step 4:
If we divide 29 by 3, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 2439.0
Deduct 27 from 29 and we're left with 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 3

Advancing to step 5:
3 goes into 27 9 times with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 24399.0
If we take 27 away from 27, we end up with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 3

Advancing to step 6:
3 can be fit into 3 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 243991.0
Subtract 3 from 3 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
If we divide 0 by 3, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 243991.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 243991.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 243991.0 with a remainder of 0.0.