899746 ÷ 45 
The aim is to understand the frequency of 45 in 899746.

Going ahead to step 1:
8 divided by 45 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 45

On to step 2:
89 divided by 45 is 1 with a remainder of 44.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 45 from 89 leaves us with 44.
Include the next digit (9) from the dividend after 44, then repeat: 449 / 45

On to step 3:
If we divide 449 by 45, we get 9 and a remainder of 44.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
The remainder is 44 after subtracting 405 from 449.
Grab the next digit (7) from the dividend, add it to 44, then carry on: 447 / 45

On to step 4:
If we divide 447 by 45, we get 9 and a remainder of 42.
The number 9 becomes the next digit in our result. 
Result so far: 199.0
Subtracting 405 from 447 leaves us with 42.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 45

Step 5:
When dividing 424 by 45, we get 9 with a remainder of 19.
The next digit of our result is 9. 
Result so far: 1999.0
Subtract 405 from 424 to get 19.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 45

On to step 6:
45 goes into 196 4 times with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 19994.0
The remainder is 16 after subtracting 180 from 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 7:
If we divide 160 by 45, we get 3 and a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 19994.3
If we take 135 away from 160, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 8:
250 divided by 45 is 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 19994.35
The remainder is 25 after subtracting 225 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
When dividing 250 by 45, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 19994.355
Deduct 225 from 250 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final outcome is 19994.355, with a leftover of 0.0025.