We're dividing 159669 by 85 
The aim is to understand the frequency of 85 in 159669.

Step 1:
85 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 85

On to step 2:
85 can be fit into 15 0 times, resulting in a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 85

Let's proceed to step 3:
85 can be fit into 159 1 times, resulting in a remainder of 74.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 85 from 159 leaves us with 74.
Take the next digit (6) from the dividend and append it to 74, then repeat: 746 / 85

Let's proceed to step 4:
85 goes into 746 8 times with a remainder of 66.
The next digit of our result is 8. 
Result so far: 18.0
Subtract 680 from 746 to get 66.
Grab the next digit (6) from the dividend, add it to 66, then carry on: 666 / 85

Step 5:
85 can be fit into 666 7 times, resulting in a remainder of 71.
Write down 7 as next digit of the result. 
Result so far: 187.0
If we subtract 595 from 666, we get 71.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 85

On to step 6:
85 goes into 719 8 times with a remainder of 39.
Use 8 as the next digit of our solution. 
Result so far: 1878.0
The remainder is 39 after subtracting 680 from 719.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 7:
85 can be fit into 390 4 times, resulting in a remainder of 50.
The next digit of our result is 4. 
Result so far: 1878.4
If we subtract 340 from 390, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
85 goes into 500 5 times with a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 1878.45
Subtract 425 from 500 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 9:
The number 85 fits into 750 8 times, leaving a remainder of 70.
Use 8 as the next digit of our solution. 
Result so far: 1878.458
If we take 680 away from 750, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 10:
85 can be fit into 700 8 times, resulting in a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 1878.4588
Subtract 680 from 700 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 1878.4588 and a remainder of 0.0002.