158859 divided by 80 
The aim is to understand the frequency of 80 in 158859.

Let's proceed to step 1:
The number 80 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 80

Going ahead to step 2:
15 divided by 80 is 0 with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 80

Step 3:
80 can be fit into 158 1 times, resulting in a remainder of 78.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 80 from 158 to get 78.
Include the next digit (8) from the dividend after 78, then repeat: 788 / 80

Step 4:
788 divided by 80 is 9 with a remainder of 68.
The next digit of our result is 9. 
Result so far: 19.0
Subtracting 720 from 788 leaves us with 68.
Bring next digit (5) of the dividend behind the 68 and repeat the process: 685 / 80

Advancing to step 5:
80 can be fit into 685 8 times, resulting in a remainder of 45.
Record the quotient 8 as the next digit in the result. 
Result so far: 198.0
Subtracting 640 from 685 leaves us with 45.
Include the next digit (9) from the dividend after 45, then repeat: 459 / 80

Let's proceed to step 6:
80 goes into 459 5 times with a remainder of 59.
Record the quotient 5 as the next digit in the result. 
Result so far: 1985.0
The remainder is 59 after subtracting 400 from 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 7:
When dividing 590 by 80, we get 7 with a remainder of 30.
Put 7 as the next digit of the answer. 
Result so far: 1985.7
If we subtract 560 from 590, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
80 can be fit into 300 3 times, resulting in a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 1985.73
Deduct 240 from 300 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
80 goes into 600 7 times with a remainder of 40.
The next digit of our result is 7. 
Result so far: 1985.737
If we take 560 away from 600, we end up 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.

Going ahead to step 10:
400 divided by 80 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 1985.7375
If we subtract 400 from 400, we 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 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 1985.7375
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.

Step 12:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1985.7375
If we subtract 0 from 0, we 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.

The final result is 1985.7375 with a remainder of 0.0.