We divide 150841 by 3
The aim is to understand the frequency of 3 in 150841.

Step 1:
If we divide 1 by 3, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 3

Advancing to step 2:
If we divide 15 by 3, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 15 from 15, we get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 3

Going ahead to step 3:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 50.0
Subtracting 0 from 0 leaves us with 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 3

Step 4:
When dividing 8 by 3, we get 2 with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 502.0
Subtracting 6 from 8 leaves us with 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 3

Step 5:
The number 3 fits into 24 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 5028.0
Subtracting 24 from 24 leaves us with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 3

Moving on to step 6:
If we divide 1 by 3, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 50280.0
Deduct 0 from 1 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.

Step 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 50280.3
If we take 9 away from 10, we end up 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.

On to step 8:
3 goes into 10 3 times with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 50280.33
Subtracting 9 from 10 leaves us 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.

The final result is 50280.33 with a remainder of 0.001.