90117642 divided by 449 
The aim is to understand the frequency of 449 in 90117642.

Moving on to step 1:
If we divide 9 by 449, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 449

Let's proceed to step 2:
449 can be fit into 90 0 times, resulting in a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Bring next digit (1) of the dividend behind the 90 and repeat the process: 901 / 449

Going ahead to step 3:
901 divided by 449 is 2 with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 898 away from 901, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 449

Going ahead to step 4:
When dividing 31 by 449, we get 0 with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 20.0
The remainder is 31 after subtracting 0 from 31.
Bring next digit (7) of the dividend behind the 31 and repeat the process: 317 / 449

Going ahead to step 5:
449 can be fit into 317 0 times, resulting in a remainder of 317.
The number 0 becomes the next digit in our result. 
Result so far: 200.0
Subtracting 0 from 317 leaves us with 317.
Grab the next digit (6) from the dividend, add it to 317, then carry on: 3176 / 449

Moving on to step 6:
If we divide 3176 by 449, we get 7 and a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 2007.0
If we subtract 3143 from 3176, we get 33.
Append the next digit (4) from the dividend to 33 and continue with: 334 / 449

Let's proceed to step 7:
When dividing 334 by 449, we get 0 with a remainder of 334.
Record the quotient 0 as the next digit in the result. 
Result so far: 20070.0
Subtract 0 from 334 to get 334.
Fetch the next digit (2) from the dividend, attach it to 334 and continue: 3342 / 449

Step 8:
449 goes into 3342 7 times with a remainder of 199.
Use 7 as the next digit of our solution. 
Result so far: 200707.0
If we take 3143 away from 3342, we end up with 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Going ahead to step 9:
449 goes into 1990 4 times with a remainder of 194.
Put 4 as the next digit of the answer. 
Result so far: 200707.4
If we subtract 1796 from 1990, we get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Step 10:
449 can be fit into 1940 4 times, resulting in a remainder of 144.
Write down 4 as next digit of the result. 
Result so far: 200707.44
If we subtract 1796 from 1940, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

The final outcome is 200707.44, with a leftover of 0.144.