We're dividing 39718999 by 280 
The aim is to understand the frequency of 280 in 39718999.

On to step 1:
280 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 280

On to step 2:
The number 280 fits into 39 0 times, leaving a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Fetch the next digit (7) from the dividend, attach it to 39 and continue: 397 / 280

Advancing to step 3:
397 divided by 280 is 1 with a remainder of 117.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 280 from 397 leaves us with 117.
Fetch the next digit (1) from the dividend, attach it to 117 and continue: 1171 / 280

Moving on to step 4:
When dividing 1171 by 280, we get 4 with a remainder of 51.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
The remainder is 51 after subtracting 1120 from 1171.
Bring next digit (8) of the dividend behind the 51 and repeat the process: 518 / 280

Step 5:
280 goes into 518 1 times with a remainder of 238.
Use 1 as the next digit of our solution. 
Result so far: 141.0
If we take 280 away from 518, we end up with 238.
Fetch the next digit (9) from the dividend, attach it to 238 and continue: 2389 / 280

Advancing to step 6:
2389 divided by 280 is 8 with a remainder of 149.
Record the quotient 8 as the next digit in the result. 
Result so far: 1418.0
If we subtract 2240 from 2389, we get 149.
Grab the next digit (9) from the dividend, add it to 149, then carry on: 1499 / 280

Advancing to step 7:
The number 280 fits into 1499 5 times, leaving a remainder of 99.
Record the quotient 5 as the next digit in the result. 
Result so far: 14185.0
If we take 1400 away from 1499, we end up with 99.
Include the next digit (9) from the dividend after 99, then repeat: 999 / 280

On to step 8:
280 goes into 999 3 times with a remainder of 159.
Record the quotient 3 as the next digit in the result. 
Result so far: 141853.0
Deduct 840 from 999 and we're left with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Advancing to step 9:
When dividing 1590 by 280, we get 5 with a remainder of 190.
Put 5 as the next digit of the answer. 
Result so far: 141853.5
Subtracting 1400 from 1590 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Step 10:
If we divide 1900 by 280, we get 6 and a remainder of 220.
The next digit of our result is 6. 
Result so far: 141853.56
If we take 1680 away from 1900, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 11:
The number 280 fits into 2200 7 times, leaving a remainder of 240.
Record the quotient 7 as the next digit in the result. 
Result so far: 141853.567
Deduct 1960 from 2200 and we're left 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.
Record the quotient 8 as the next digit in the result. 
Result so far: 141853.5678
Subtract 2240 from 2400 to 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.

Advancing to step 13:
The number 280 fits into 1600 5 times, leaving a remainder of 200.
Put 5 as the next digit of the answer. 
Result so far: 141853.56785
Subtracting 1400 from 1600 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

On to step 14:
If we divide 2000 by 280, we get 7 and a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 141853.567857
The remainder is 40 after subtracting 1960 from 2000.
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 15:
280 can be fit into 400 1 times, resulting in a remainder of 120.
Write down 1 as next digit of the result. 
Result so far: 141853.5678571
If we take 280 away from 400, we end up 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.

Going ahead to step 16:
280 can be fit into 1200 4 times, resulting in a remainder of 80.
Use 4 as the next digit of our solution. 
Result so far: 141853.56785714
Subtracting 1120 from 1200 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.

The quotient of the division is 141853.56785714, and the remainder is 8e-08.