We divide 671680 by 85
The aim is to understand the frequency of 85 in 671680.

On to step 1:
When dividing 6 by 85, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 85

Advancing to step 2:
The number 85 fits into 67 0 times, leaving a remainder of 67.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 67 leaves us with 67.
Fetch the next digit (1) from the dividend, attach it to 67 and continue: 671 / 85

On to step 3:
If we divide 671 by 85, we get 7 and a remainder of 76.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 595 away from 671, we end up with 76.
Append the next digit (6) from the dividend to 76 and continue with: 766 / 85

Moving on to step 4:
85 goes into 766 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 79.0
Subtracting 765 from 766 leaves us with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 85

Let's proceed to step 5:
85 goes into 18 0 times with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 790.0
If we take 0 away from 18, we end up with 18.
Bring next digit (0) of the dividend behind the 18 and repeat the process: 180 / 85

Moving on to step 6:
If we divide 180 by 85, we get 2 and a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 7902.0
Subtract 170 from 180 to 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.

Advancing to step 7:
100 divided by 85 is 1 with a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 7902.1
Subtracting 85 from 100 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
The number 85 fits into 150 1 times, leaving a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 7902.11
Subtract 85 from 150 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The quotient of the division is 7902.11, and the remainder is 0.065.