We look at the division of 86068435 by 280 
The aim is to understand the frequency of 280 in 86068435.

On to step 1:
280 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 280

Going ahead to step 2:
When dividing 86 by 280, we get 0 with a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Append the next digit (0) from the dividend to 86 and continue with: 860 / 280

Let's proceed to step 3:
When dividing 860 by 280, we get 3 with a remainder of 20.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 840 from 860 to get 20.
Include the next digit (6) from the dividend after 20, then repeat: 206 / 280

Moving on to step 4:
206 divided by 280 is 0 with a remainder of 206.
Write down 0 as next digit of the result. 
Result so far: 30.0
Deduct 0 from 206 and we're left with 206.
Bring next digit (8) of the dividend behind the 206 and repeat the process: 2068 / 280

On to step 5:
280 can be fit into 2068 7 times, resulting in a remainder of 108.
The number 7 becomes the next digit in our result. 
Result so far: 307.0
If we subtract 1960 from 2068, we get 108.
Fetch the next digit (4) from the dividend, attach it to 108 and continue: 1084 / 280

Step 6:
280 can be fit into 1084 3 times, resulting in a remainder of 244.
Put 3 as the next digit of the answer. 
Result so far: 3073.0
If we subtract 840 from 1084, we get 244.
Include the next digit (3) from the dividend after 244, then repeat: 2443 / 280

On to step 7:
The number 280 fits into 2443 8 times, leaving a remainder of 203.
Write down 8 as next digit of the result. 
Result so far: 30738.0
If we subtract 2240 from 2443, we get 203.
Bring next digit (5) of the dividend behind the 203 and repeat the process: 2035 / 280

Step 8:
The number 280 fits into 2035 7 times, leaving a remainder of 75.
The next digit of our result is 7. 
Result so far: 307387.0
The remainder is 75 after subtracting 1960 from 2035.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 9:
280 goes into 750 2 times with a remainder of 190.
Record the quotient 2 as the next digit in the result. 
Result so far: 307387.2
If we subtract 560 from 750, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 10:
The number 280 fits into 1900 6 times, leaving a remainder of 220.
The number 6 becomes the next digit in our result. 
Result so far: 307387.26
Subtract 1680 from 1900 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 11:
The number 280 fits into 2200 7 times, leaving a remainder of 240.
The number 7 becomes the next digit in our result. 
Result so far: 307387.267
If we take 1960 away from 2200, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 12:
The number 280 fits into 2400 8 times, leaving a remainder of 160.
Put 8 as the next digit of the answer. 
Result so far: 307387.2678
If we subtract 2240 from 2400, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 13:
If we divide 1600 by 280, we get 5 and a remainder of 200.
Put 5 as the next digit of the answer. 
Result so far: 307387.26785
The remainder is 200 after subtracting 1400 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 14:
When dividing 2000 by 280, we get 7 with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 307387.267857
Subtract 1960 from 2000 to 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.

Advancing to step 15:
The number 280 fits into 400 1 times, leaving a remainder of 120.
Put 1 as the next digit of the answer. 
Result so far: 307387.2678571
Subtracting 280 from 400 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 16:
If we divide 1200 by 280, we get 4 and a remainder of 80.
The next digit of our result is 4. 
Result so far: 307387.26785714
Subtract 1120 from 1200 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 307387.26785714 with a remainder of 8e-08.