We look at the division of 438250 by 85 
The aim is to understand the frequency of 85 in 438250.

On to step 1:
4 divided by 85 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 85

Let's proceed to step 2:
43 divided by 85 is 0 with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Grab the next digit (8) from the dividend, add it to 43, then carry on: 438 / 85

Going ahead to step 3:
85 goes into 438 5 times with a remainder of 13.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 425 from 438 and we're left with 13.
Grab the next digit (2) from the dividend, add it to 13, then carry on: 132 / 85

Advancing to step 4:
85 goes into 132 1 times with a remainder of 47.
Use 1 as the next digit of our solution. 
Result so far: 51.0
Subtract 85 from 132 to get 47.
Include the next digit (5) from the dividend after 47, then repeat: 475 / 85

Let's proceed to step 5:
When dividing 475 by 85, we get 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 515.0
If we take 425 away from 475, we end up with 50.
Grab the next digit (0) from the dividend, add it to 50, then carry on: 500 / 85

Going ahead to step 6:
500 divided by 85 is 5 with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 5155.0
If we subtract 425 from 500, we 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.

Moving on to step 7:
When dividing 750 by 85, we get 8 with a remainder of 70.
Put 8 as the next digit of the answer. 
Result so far: 5155.8
The remainder is 70 after subtracting 680 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
When dividing 700 by 85, we get 8 with a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 5155.88
The remainder is 20 after subtracting 680 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 5155.88, with a leftover of 0.02.