78565391 divided by 274 
The aim is to understand the frequency of 274 in 78565391.

On to step 1:
If we divide 7 by 274, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 274

Advancing to step 2:
274 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Append the next digit (5) from the dividend to 78 and continue with: 785 / 274

On to step 3:
274 goes into 785 2 times with a remainder of 237.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 548 from 785 and we're left with 237.
Include the next digit (6) from the dividend after 237, then repeat: 2376 / 274

Advancing to step 4:
2376 divided by 274 is 8 with a remainder of 184.
The next digit of our result is 8. 
Result so far: 28.0
If we subtract 2192 from 2376, we get 184.
Grab the next digit (5) from the dividend, add it to 184, then carry on: 1845 / 274

Advancing to step 5:
The number 274 fits into 1845 6 times, leaving a remainder of 201.
Write down 6 as next digit of the result. 
Result so far: 286.0
If we subtract 1644 from 1845, we get 201.
Bring next digit (3) of the dividend behind the 201 and repeat the process: 2013 / 274

Going ahead to step 6:
274 can be fit into 2013 7 times, resulting in a remainder of 95.
The number 7 becomes the next digit in our result. 
Result so far: 2867.0
Deduct 1918 from 2013 and we're left with 95.
Fetch the next digit (9) from the dividend, attach it to 95 and continue: 959 / 274

Let's proceed to step 7:
If we divide 959 by 274, we get 3 and a remainder of 137.
Record the quotient 3 as the next digit in the result. 
Result so far: 28673.0
Subtracting 822 from 959 leaves us with 137.
Grab the next digit (1) from the dividend, add it to 137, then carry on: 1371 / 274

Let's proceed to step 8:
274 goes into 1371 5 times with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 286735.0
If we take 1370 away from 1371, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 9:
274 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 286735.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
274 can be fit into 100 0 times, resulting in a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 286735.0
Subtract 0 from 100 to 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.

The final result is 286735.0 with a remainder of 0.1.