We divide 551940 by 78
The aim is to understand the frequency of 78 in 551940.

Advancing to step 1:
5 divided by 78 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 78

On to step 2:
55 divided by 78 is 0 with a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 55 after subtracting 0 from 55.
Include the next digit (1) from the dividend after 55, then repeat: 551 / 78

Going ahead to step 3:
78 goes into 551 7 times with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 546 away from 551, we end up with 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 78

Step 4:
78 can be fit into 59 0 times, resulting in a remainder of 59.
The next digit of our result is 0. 
Result so far: 70.0
Deduct 0 from 59 and we're left with 59.
Fetch the next digit (4) from the dividend, attach it to 59 and continue: 594 / 78

On to step 5:
When dividing 594 by 78, we get 7 with a remainder of 48.
The next digit of our result is 7. 
Result so far: 707.0
If we take 546 away from 594, we end up with 48.
Grab the next digit (0) from the dividend, add it to 48, then carry on: 480 / 78

Advancing to step 6:
The number 78 fits into 480 6 times, leaving a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 7076.0
Deduct 468 from 480 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
If we divide 120 by 78, we get 1 and a remainder of 42.
The number 1 becomes the next digit in our result. 
Result so far: 7076.1
Subtract 78 from 120 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 8:
When dividing 420 by 78, we get 5 with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 7076.15
Subtracting 390 from 420 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
When dividing 300 by 78, we get 3 with a remainder of 66.
The number 3 becomes the next digit in our result. 
Result so far: 7076.153
The remainder is 66 after subtracting 234 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 10:
When dividing 660 by 78, we get 8 with a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 7076.1538
Subtracting 624 from 660 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 11:
If we divide 360 by 78, we get 4 and a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 7076.15384
If we subtract 312 from 360, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 12:
78 can be fit into 480 6 times, resulting in a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 7076.153846
Subtracting 468 from 480 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
78 goes into 120 1 times with a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 7076.1538461
If we take 78 away from 120, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 14:
When dividing 420 by 78, we get 5 with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 7076.15384615
If we subtract 390 from 420, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 7076.15384615 and a remainder of 3e-08.