We look at the division of 68625019 by 280 
The aim is to understand the frequency of 280 in 68625019.

Advancing to step 1:
When dividing 6 by 280, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 280

On to step 2:
280 can be fit into 68 0 times, resulting in a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 68 and we're left with 68.
Append the next digit (6) from the dividend to 68 and continue with: 686 / 280

On to step 3:
The number 280 fits into 686 2 times, leaving a remainder of 126.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 126 after subtracting 560 from 686.
Bring next digit (2) of the dividend behind the 126 and repeat the process: 1262 / 280

Advancing to step 4:
The number 280 fits into 1262 4 times, leaving a remainder of 142.
The next digit of our result is 4. 
Result so far: 24.0
The remainder is 142 after subtracting 1120 from 1262.
Take the next digit (5) from the dividend and append it to 142, then repeat: 1425 / 280

Let's proceed to step 5:
If we divide 1425 by 280, we get 5 and a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 245.0
Subtracting 1400 from 1425 leaves us with 25.
Fetch the next digit (0) from the dividend, attach it to 25 and continue: 250 / 280

Step 6:
When dividing 250 by 280, we get 0 with a remainder of 250.
The next digit of our result is 0. 
Result so far: 2450.0
If we take 0 away from 250, we end up with 250.
Append the next digit (1) from the dividend to 250 and continue with: 2501 / 280

Step 7:
When dividing 2501 by 280, we get 8 with a remainder of 261.
The number 8 becomes the next digit in our result. 
Result so far: 24508.0
Subtracting 2240 from 2501 leaves us with 261.
Include the next digit (9) from the dividend after 261, then repeat: 2619 / 280

Step 8:
If we divide 2619 by 280, we get 9 and a remainder of 99.
Put 9 as the next digit of the answer. 
Result so far: 245089.0
If we subtract 2520 from 2619, we get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Going ahead to step 9:
990 divided by 280 is 3 with a remainder of 150.
Use 3 as the next digit of our solution. 
Result so far: 245089.3
Subtract 840 from 990 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 10:
280 can be fit into 1500 5 times, resulting in a remainder of 100.
The next digit of our result is 5. 
Result so far: 245089.35
If we subtract 1400 from 1500, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 11:
1000 divided by 280 is 3 with a remainder of 160.
Record the quotient 3 as the next digit in the result. 
Result so far: 245089.353
Subtracting 840 from 1000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 12:
280 can be fit into 1600 5 times, resulting in a remainder of 200.
Use 5 as the next digit of our solution. 
Result so far: 245089.3535
Subtract 1400 from 1600 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 13:
If we divide 2000 by 280, we get 7 and a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 245089.35357
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.

Step 14:
If we divide 400 by 280, we get 1 and a remainder of 120.
The next digit of our result is 1. 
Result so far: 245089.353571
Deduct 280 from 400 and we're left 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.

Let's proceed to step 15:
When dividing 1200 by 280, we get 4 with a remainder of 80.
Put 4 as the next digit of the answer. 
Result so far: 245089.3535714
If we subtract 1120 from 1200, we 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.

Step 16:
The number 280 fits into 800 2 times, leaving a remainder of 240.
Use 2 as the next digit of our solution. 
Result so far: 245089.35357142
Subtract 560 from 800 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The final result is 245089.35357142 with a remainder of 2.4e-07.