20990990 divided by 488 
The aim is to understand the frequency of 488 in 20990990.

Step 1:
When dividing 2 by 488, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 488

Moving on to step 2:
When dividing 20 by 488, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 488

Moving on to step 3:
The number 488 fits into 209 0 times, leaving a remainder of 209.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 209, we end up with 209.
Append the next digit (9) from the dividend to 209 and continue with: 2099 / 488

Going ahead to step 4:
The number 488 fits into 2099 4 times, leaving a remainder of 147.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 1952 from 2099 to get 147.
Bring next digit (0) of the dividend behind the 147 and repeat the process: 1470 / 488

Let's proceed to step 5:
When dividing 1470 by 488, we get 3 with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 43.0
If we subtract 1464 from 1470, we get 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 488

Advancing to step 6:
488 can be fit into 69 0 times, resulting in a remainder of 69.
Put 0 as the next digit of the answer. 
Result so far: 430.0
Subtract 0 from 69 to get 69.
Append the next digit (9) from the dividend to 69 and continue with: 699 / 488

Going ahead to step 7:
If we divide 699 by 488, we get 1 and a remainder of 211.
The next digit of our result is 1. 
Result so far: 4301.0
The remainder is 211 after subtracting 488 from 699.
Grab the next digit (0) from the dividend, add it to 211, then carry on: 2110 / 488

Let's proceed to step 8:
488 can be fit into 2110 4 times, resulting in a remainder of 158.
Use 4 as the next digit of our solution. 
Result so far: 43014.0
If we take 1952 away from 2110, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 9:
488 can be fit into 1580 3 times, resulting in a remainder of 116.
Record the quotient 3 as the next digit in the result. 
Result so far: 43014.3
The remainder is 116 after subtracting 1464 from 1580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Moving on to step 10:
When dividing 1160 by 488, we get 2 with a remainder of 184.
Put 2 as the next digit of the answer. 
Result so far: 43014.32
Subtracting 976 from 1160 leaves us with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Going ahead to step 11:
488 can be fit into 1840 3 times, resulting in a remainder of 376.
The number 3 becomes the next digit in our result. 
Result so far: 43014.323
Subtracting 1464 from 1840 leaves us with 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Going ahead to step 12:
When dividing 3760 by 488, we get 7 with a remainder of 344.
Record the quotient 7 as the next digit in the result. 
Result so far: 43014.3237
The remainder is 344 after subtracting 3416 from 3760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Going ahead to step 13:
If we divide 3440 by 488, we get 7 and a remainder of 24.
The next digit of our result is 7. 
Result so far: 43014.32377
If we subtract 3416 from 3440, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 43014.32377 and a remainder of 2.4e-05.