We're dividing 507409 by 85 
The aim is to understand the frequency of 85 in 507409.

Step 1:
The number 85 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 85

On to step 2:
50 divided by 85 is 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 50, we end up with 50.
Fetch the next digit (7) from the dividend, attach it to 50 and continue: 507 / 85

Step 3:
507 divided by 85 is 5 with a remainder of 82.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 425 away from 507, we end up with 82.
Append the next digit (4) from the dividend to 82 and continue with: 824 / 85

On to step 4:
824 divided by 85 is 9 with a remainder of 59.
Record the quotient 9 as the next digit in the result. 
Result so far: 59.0
Deduct 765 from 824 and we're left with 59.
Fetch the next digit (0) from the dividend, attach it to 59 and continue: 590 / 85

Step 5:
When dividing 590 by 85, we get 6 with a remainder of 80.
Use 6 as the next digit of our solution. 
Result so far: 596.0
Deduct 510 from 590 and we're left with 80.
Grab the next digit (9) from the dividend, add it to 80, then carry on: 809 / 85

Advancing to step 6:
85 goes into 809 9 times with a remainder of 44.
The number 9 becomes the next digit in our result. 
Result so far: 5969.0
If we take 765 away from 809, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 7:
If we divide 440 by 85, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 5969.5
Subtracting 425 from 440 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.

Step 8:
85 goes into 150 1 times with a remainder of 65.
Use 1 as the next digit of our solution. 
Result so far: 5969.51
If we subtract 85 from 150, we 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.

Moving on to step 9:
85 can be fit into 650 7 times, resulting in a remainder of 55.
The next digit of our result is 7. 
Result so far: 5969.517
If we take 595 away from 650, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 10:
When dividing 550 by 85, we get 6 with a remainder of 40.
Use 6 as the next digit of our solution. 
Result so far: 5969.5176
If we subtract 510 from 550, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 11:
85 can be fit into 400 4 times, resulting in a remainder of 60.
The next digit of our result is 4. 
Result so far: 5969.51764
If we take 340 away from 400, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 12:
When dividing 600 by 85, we get 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 5969.517647
If we take 595 away from 600, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 13:
85 can be fit into 50 0 times, resulting in a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 5969.517647
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 14:
When dividing 500 by 85, we get 5 with a remainder of 75.
Put 5 as the next digit of the answer. 
Result so far: 5969.51764705
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.

The final outcome is 5969.51764705, with a leftover of 7.5e-08.