Let's divide 90023989 by 240
The aim is to understand the frequency of 240 in 90023989.

On to step 1:
240 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 240

Moving on to step 2:
240 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Append the next digit (0) from the dividend to 90 and continue with: 900 / 240

On to step 3:
If we divide 900 by 240, we get 3 and a remainder of 180.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 720 from 900 to get 180.
Grab the next digit (2) from the dividend, add it to 180, then carry on: 1802 / 240

On to step 4:
If we divide 1802 by 240, we get 7 and a remainder of 122.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
Subtracting 1680 from 1802 leaves us with 122.
Append the next digit (3) from the dividend to 122 and continue with: 1223 / 240

Let's proceed to step 5:
The number 240 fits into 1223 5 times, leaving a remainder of 23.
The number 5 becomes the next digit in our result. 
Result so far: 375.0
If we subtract 1200 from 1223, we get 23.
Grab the next digit (9) from the dividend, add it to 23, then carry on: 239 / 240

Moving on to step 6:
When dividing 239 by 240, we get 0 with a remainder of 239.
Put 0 as the next digit of the answer. 
Result so far: 3750.0
Deduct 0 from 239 and we're left with 239.
Fetch the next digit (8) from the dividend, attach it to 239 and continue: 2398 / 240

Let's proceed to step 7:
240 goes into 2398 9 times with a remainder of 238.
Write down 9 as next digit of the result. 
Result so far: 37509.0
If we subtract 2160 from 2398, we get 238.
Grab the next digit (9) from the dividend, add it to 238, then carry on: 2389 / 240

Let's proceed to step 8:
240 can be fit into 2389 9 times, resulting in a remainder of 229.
The number 9 becomes the next digit in our result. 
Result so far: 375099.0
The remainder is 229 after subtracting 2160 from 2389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Moving on to step 9:
The number 240 fits into 2290 9 times, leaving a remainder of 130.
The number 9 becomes the next digit in our result. 
Result so far: 375099.9
If we subtract 2160 from 2290, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 10:
1300 divided by 240 is 5 with a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 375099.95
Subtract 1200 from 1300 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 11:
The number 240 fits into 1000 4 times, leaving a remainder of 40.
The next digit of our result is 4. 
Result so far: 375099.954
If we subtract 960 from 1000, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 12:
400 divided by 240 is 1 with a remainder of 160.
Record the quotient 1 as the next digit in the result. 
Result so far: 375099.9541
If we take 240 away from 400, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 13:
When dividing 1600 by 240, we get 6 with a remainder of 160.
Use 6 as the next digit of our solution. 
Result so far: 375099.95416
If we subtract 1440 from 1600, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 14:
If we divide 1600 by 240, we get 6 and a remainder of 160.
Use 6 as the next digit of our solution. 
Result so far: 375099.954166
Subtracting 1440 from 1600 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

The final outcome is 375099.954166, with a leftover of 1.6e-05.