We're dividing 7854870 by 85 
The aim is to understand the frequency of 85 in 7854870.

Step 1:
The number 85 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 85

Advancing to step 2:
78 divided by 85 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Fetch the next digit (5) from the dividend, attach it to 78 and continue: 785 / 85

Step 3:
85 can be fit into 785 9 times, resulting in a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 765 from 785 to get 20.
Fetch the next digit (4) from the dividend, attach it to 20 and continue: 204 / 85

Let's proceed to step 4:
85 goes into 204 2 times with a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
If we take 170 away from 204, we end up with 34.
Take the next digit (8) from the dividend and append it to 34, then repeat: 348 / 85

Going ahead to step 5:
If we divide 348 by 85, we get 4 and a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 924.0
If we take 340 away from 348, we end up with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 85

Step 6:
85 goes into 87 1 times with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 9241.0
The remainder is 2 after subtracting 85 from 87.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 85

Advancing to step 7:
If we divide 20 by 85, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 92410.0
If we take 0 away from 20, we end up 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:
When dividing 200 by 85, we get 2 with a remainder of 30.
Put 2 as the next digit of the answer. 
Result so far: 92410.2
If we take 170 away from 200, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
85 goes into 300 3 times with a remainder of 45.
The number 3 becomes the next digit in our result. 
Result so far: 92410.23
If we subtract 255 from 300, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 10:
If we divide 450 by 85, we get 5 and a remainder of 25.
The next digit of our result is 5. 
Result so far: 92410.235
The remainder is 25 after subtracting 425 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 11:
The number 85 fits into 250 2 times, leaving a remainder of 80.
Put 2 as the next digit of the answer. 
Result so far: 92410.2352
Subtracting 170 from 250 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 12:
The number 85 fits into 800 9 times, leaving a remainder of 35.
Record the quotient 9 as the next digit in the result. 
Result so far: 92410.23529
The remainder is 35 after subtracting 765 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 13:
85 can be fit into 350 4 times, resulting in a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 92410.235294
Deduct 340 from 350 and we're left with 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 14:
85 can be fit into 100 1 times, resulting in a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 92410.2352941
Deduct 85 from 100 and we're left 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.

Moving on to step 15:
If we divide 150 by 85, we get 1 and a remainder of 65.
Write down 1 as next digit of the result. 
Result so far: 92410.23529411
The remainder is 65 after subtracting 85 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The final result is 92410.23529411 with a remainder of 6.5e-08.