We're dividing 21450292 by 85 
The aim is to understand the frequency of 85 in 21450292.

On to step 1:
When dividing 2 by 85, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 85

Let's proceed to step 2:
When dividing 21 by 85, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 85

Step 3:
85 goes into 214 2 times with a remainder of 44.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 170 away from 214, we end up with 44.
Grab the next digit (5) from the dividend, add it to 44, then carry on: 445 / 85

On to step 4:
When dividing 445 by 85, we get 5 with a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we take 425 away from 445, we end up with 20.
Bring next digit (0) of the dividend behind the 20 and repeat the process: 200 / 85

On to step 5:
When dividing 200 by 85, we get 2 with a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 252.0
Deduct 170 from 200 and we're left with 30.
Grab the next digit (2) from the dividend, add it to 30, then carry on: 302 / 85

Moving on to step 6:
302 divided by 85 is 3 with a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 2523.0
If we subtract 255 from 302, we get 47.
Include the next digit (9) from the dividend after 47, then repeat: 479 / 85

On to step 7:
85 can be fit into 479 5 times, resulting in a remainder of 54.
Record the quotient 5 as the next digit in the result. 
Result so far: 25235.0
If we subtract 425 from 479, we get 54.
Grab the next digit (2) from the dividend, add it to 54, then carry on: 542 / 85

Advancing to step 8:
If we divide 542 by 85, we get 6 and a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 252356.0
The remainder is 32 after subtracting 510 from 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 9:
85 can be fit into 320 3 times, resulting in a remainder of 65.
Write down 3 as next digit of the result. 
Result so far: 252356.3
Deduct 255 from 320 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 10:
650 divided by 85 is 7 with a remainder of 55.
The number 7 becomes the next digit in our result. 
Result so far: 252356.37
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.

Going ahead to step 11:
550 divided by 85 is 6 with a remainder of 40.
The next digit of our result is 6. 
Result so far: 252356.376
The remainder is 40 after subtracting 510 from 550.
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 12:
When dividing 400 by 85, we get 4 with a remainder of 60.
Put 4 as the next digit of the answer. 
Result so far: 252356.3764
Subtract 340 from 400 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 13:
If we divide 600 by 85, we get 7 and a remainder of 5.
The next digit of our result is 7. 
Result so far: 252356.37647
If we subtract 595 from 600, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
85 goes into 50 0 times with a remainder of 50.
The next digit of our result is 0. 
Result so far: 252356.37647
If we subtract 0 from 50, 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.

Step 15:
The number 85 fits into 500 5 times, leaving a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 252356.3764705
Subtracting 425 from 500 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 16:
85 goes into 750 8 times with a remainder of 70.
Use 8 as the next digit of our solution. 
Result so far: 252356.37647058
If we subtract 680 from 750, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Our division results in 252356.37647058 with a remaining 7e-08.