19519989 ÷ 279 
The aim is to understand the frequency of 279 in 19519989.

On to step 1:
1 divided by 279 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 279

On to step 2:
If we divide 19 by 279, we get 0 and a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 19 and we're left with 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 279

On to step 3:
195 divided by 279 is 0 with a remainder of 195.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 195, we get 195.
Fetch the next digit (1) from the dividend, attach it to 195 and continue: 1951 / 279

On to step 4:
279 can be fit into 1951 6 times, resulting in a remainder of 277.
The next digit of our result is 6. 
Result so far: 6.0
If we take 1674 away from 1951, we end up with 277.
Bring next digit (9) of the dividend behind the 277 and repeat the process: 2779 / 279

Advancing to step 5:
If we divide 2779 by 279, we get 9 and a remainder of 268.
Put 9 as the next digit of the answer. 
Result so far: 69.0
The remainder is 268 after subtracting 2511 from 2779.
Grab the next digit (9) from the dividend, add it to 268, then carry on: 2689 / 279

On to step 6:
2689 divided by 279 is 9 with a remainder of 178.
The number 9 becomes the next digit in our result. 
Result so far: 699.0
The remainder is 178 after subtracting 2511 from 2689.
Bring next digit (8) of the dividend behind the 178 and repeat the process: 1788 / 279

On to step 7:
The number 279 fits into 1788 6 times, leaving a remainder of 114.
Put 6 as the next digit of the answer. 
Result so far: 6996.0
Subtract 1674 from 1788 to get 114.
Grab the next digit (9) from the dividend, add it to 114, then carry on: 1149 / 279

On to step 8:
When dividing 1149 by 279, we get 4 with a remainder of 33.
Put 4 as the next digit of the answer. 
Result so far: 69964.0
Subtract 1116 from 1149 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 9:
When dividing 330 by 279, we get 1 with a remainder of 51.
The number 1 becomes the next digit in our result. 
Result so far: 69964.1
If we subtract 279 from 330, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 10:
The number 279 fits into 510 1 times, leaving a remainder of 231.
Record the quotient 1 as the next digit in the result. 
Result so far: 69964.11
Subtracting 279 from 510 leaves us with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

After the division, we end up with 69964.11 and a remainder of 0.231.