999381 ÷ 45 
The aim is to understand the frequency of 45 in 999381.

Advancing to step 1:
If we divide 9 by 45, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 45

Let's proceed to step 2:
The number 45 fits into 99 2 times, leaving a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 90 from 99, we get 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 45

On to step 3:
When dividing 99 by 45, we get 2 with a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 22.0
Subtract 90 from 99 to get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 45

Step 4:
The number 45 fits into 93 2 times, leaving a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 222.0
If we subtract 90 from 93, we get 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 45

Moving on to step 5:
The number 45 fits into 38 0 times, leaving a remainder of 38.
The next digit of our result is 0. 
Result so far: 2220.0
Subtracting 0 from 38 leaves us with 38.
Grab the next digit (1) from the dividend, add it to 38, then carry on: 381 / 45

Let's proceed to step 6:
If we divide 381 by 45, we get 8 and a remainder of 21.
The number 8 becomes the next digit in our result. 
Result so far: 22208.0
Subtract 360 from 381 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 7:
45 can be fit into 210 4 times, resulting in a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 22208.4
The remainder is 30 after subtracting 180 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
45 goes into 300 6 times with a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 22208.46
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
When dividing 300 by 45, we get 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 22208.466
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 22208.466 with a remainder of 0.003.