764890 ÷ 80 
The aim is to understand the frequency of 80 in 764890.

On to step 1:
7 divided by 80 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 80

On to step 2:
If we divide 76 by 80, we get 0 and a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 76, we get 76.
Bring next digit (4) of the dividend behind the 76 and repeat the process: 764 / 80

On to step 3:
When dividing 764 by 80, we get 9 with a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 720 from 764 and we're left with 44.
Fetch the next digit (8) from the dividend, attach it to 44 and continue: 448 / 80

Going ahead to step 4:
When dividing 448 by 80, we get 5 with a remainder of 48.
The number 5 becomes the next digit in our result. 
Result so far: 95.0
The remainder is 48 after subtracting 400 from 448.
Bring next digit (9) of the dividend behind the 48 and repeat the process: 489 / 80

Let's proceed to step 5:
When dividing 489 by 80, we get 6 with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 956.0
Subtract 480 from 489 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 80

Let's proceed to step 6:
80 can be fit into 90 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 9561.0
If we subtract 80 from 90, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
100 divided by 80 is 1 with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 9561.1
Deduct 80 from 100 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.

Let's proceed to step 8:
The number 80 fits into 200 2 times, leaving a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 9561.12
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.

Let's proceed to step 9:
80 goes into 400 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 9561.125
Subtracting 400 from 400 leaves us 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.

Moving on to step 10:
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: 9561.125
Deduct 0 from 0 and we're left 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.

On to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9561.125
Subtracting 0 from 0 leaves us 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.

After the division, we end up with 9561.125 and a remainder of 0.0.