142290 divided by 80 
The aim is to understand the frequency of 80 in 142290.

Let's proceed to step 1:
1 divided by 80 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 80

On to step 2:
80 goes into 14 0 times with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 14 leaves us with 14.
Append the next digit (2) from the dividend to 14 and continue with: 142 / 80

Moving on to step 3:
The number 80 fits into 142 1 times, leaving a remainder of 62.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 80 away from 142, we end up with 62.
Grab the next digit (2) from the dividend, add it to 62, then carry on: 622 / 80

On to step 4:
The number 80 fits into 622 7 times, leaving a remainder of 62.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
If we take 560 away from 622, we end up with 62.
Fetch the next digit (9) from the dividend, attach it to 62 and continue: 629 / 80

Advancing to step 5:
If we divide 629 by 80, we get 7 and a remainder of 69.
Write down 7 as next digit of the result. 
Result so far: 177.0
Subtracting 560 from 629 leaves us with 69.
Bring next digit (0) of the dividend behind the 69 and repeat the process: 690 / 80

Let's proceed to step 6:
690 divided by 80 is 8 with a remainder of 50.
Put 8 as the next digit of the answer. 
Result so far: 1778.0
The remainder is 50 after subtracting 640 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 7:
The number 80 fits into 500 6 times, leaving a remainder of 20.
The next digit of our result is 6. 
Result so far: 1778.6
Deduct 480 from 500 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
200 divided by 80 is 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 1778.62
Subtracting 160 from 200 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
80 can be fit into 400 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 1778.625
Subtract 400 from 400 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1778.625
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
80 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1778.625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 1778.625, with a leftover of 0.0.