79925899 divided by 278 
The aim is to understand the frequency of 278 in 79925899.

On to step 1:
The number 278 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 278

Let's proceed to step 2:
278 goes into 79 0 times with a remainder of 79.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Fetch the next digit (9) from the dividend, attach it to 79 and continue: 799 / 278

Step 3:
When dividing 799 by 278, we get 2 with a remainder of 243.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 556 away from 799, we end up with 243.
Bring next digit (2) of the dividend behind the 243 and repeat the process: 2432 / 278

Moving on to step 4:
When dividing 2432 by 278, we get 8 with a remainder of 208.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
Deduct 2224 from 2432 and we're left with 208.
Take the next digit (5) from the dividend and append it to 208, then repeat: 2085 / 278

Step 5:
The number 278 fits into 2085 7 times, leaving a remainder of 139.
Put 7 as the next digit of the answer. 
Result so far: 287.0
Subtract 1946 from 2085 to get 139.
Bring next digit (8) of the dividend behind the 139 and repeat the process: 1398 / 278

Let's proceed to step 6:
The number 278 fits into 1398 5 times, leaving a remainder of 8.
The next digit of our result is 5. 
Result so far: 2875.0
If we subtract 1390 from 1398, we get 8.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 278

Step 7:
278 can be fit into 89 0 times, resulting in a remainder of 89.
The number 0 becomes the next digit in our result. 
Result so far: 28750.0
Deduct 0 from 89 and we're left with 89.
Append the next digit (9) from the dividend to 89 and continue with: 899 / 278

Step 8:
278 goes into 899 3 times with a remainder of 65.
Put 3 as the next digit of the answer. 
Result so far: 287503.0
Subtract 834 from 899 to get 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 9:
278 goes into 650 2 times with a remainder of 94.
The number 2 becomes the next digit in our result. 
Result so far: 287503.2
If we subtract 556 from 650, we get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Going ahead to step 10:
The number 278 fits into 940 3 times, leaving a remainder of 106.
The next digit of our result is 3. 
Result so far: 287503.23
The remainder is 106 after subtracting 834 from 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

On to step 11:
278 can be fit into 1060 3 times, resulting in a remainder of 226.
Use 3 as the next digit of our solution. 
Result so far: 287503.233
Deduct 834 from 1060 and we're left with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

The final result is 287503.233 with a remainder of 0.0226.