We look at the division of 976049 by 78 
The aim is to understand the frequency of 78 in 976049.

Advancing to step 1:
When dividing 9 by 78, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 78

Advancing to step 2:
When dividing 97 by 78, we get 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 78 away from 97, we end up with 19.
Append the next digit (6) from the dividend to 19 and continue with: 196 / 78

Step 3:
78 can be fit into 196 2 times, resulting in a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 156 away from 196, we end up with 40.
Take the next digit (0) from the dividend and append it to 40, then repeat: 400 / 78

On to step 4:
The number 78 fits into 400 5 times, leaving a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 125.0
If we subtract 390 from 400, we get 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 78

Moving on to step 5:
78 can be fit into 104 1 times, resulting in a remainder of 26.
Record the quotient 1 as the next digit in the result. 
Result so far: 1251.0
Subtract 78 from 104 to get 26.
Take the next digit (9) from the dividend and append it to 26, then repeat: 269 / 78

Step 6:
The number 78 fits into 269 3 times, leaving a remainder of 35.
Record the quotient 3 as the next digit in the result. 
Result so far: 12513.0
Subtract 234 from 269 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 7:
If we divide 350 by 78, we get 4 and a remainder of 38.
The number 4 becomes the next digit in our result. 
Result so far: 12513.4
If we subtract 312 from 350, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 8:
380 divided by 78 is 4 with a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 12513.44
The remainder is 68 after subtracting 312 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

After the division, we end up with 12513.44 and a remainder of 0.068.