561916 divided by 78 
The aim is to understand the frequency of 78 in 561916.

Moving on to step 1:
78 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 78

Step 2:
If we divide 56 by 78, we get 0 and a remainder of 56.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 56 to get 56.
Bring next digit (1) of the dividend behind the 56 and repeat the process: 561 / 78

Advancing to step 3:
When dividing 561 by 78, we get 7 with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 546 from 561 leaves us with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 78

Moving on to step 4:
The number 78 fits into 159 2 times, leaving a remainder of 3.
The next digit of our result is 2. 
Result so far: 72.0
If we subtract 156 from 159, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 78

Let's proceed to step 5:
78 goes into 31 0 times with a remainder of 31.
The next digit of our result is 0. 
Result so far: 720.0
Subtract 0 from 31 to get 31.
Include the next digit (6) from the dividend after 31, then repeat: 316 / 78

Advancing to step 6:
The number 78 fits into 316 4 times, leaving a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 7204.0
If we take 312 away from 316, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
If we divide 40 by 78, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 7204.0
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
78 goes into 400 5 times with a remainder of 10.
The next digit of our result is 5. 
Result so far: 7204.05
If we take 390 away from 400, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
If we divide 100 by 78, we get 1 and a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 7204.051
The remainder is 22 after subtracting 78 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 10:
If we divide 220 by 78, we get 2 and a remainder of 64.
Record the quotient 2 as the next digit in the result. 
Result so far: 7204.0512
Subtracting 156 from 220 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 11:
78 can be fit into 640 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 7204.05128
If we subtract 624 from 640, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
If we divide 160 by 78, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 7204.051282
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 13:
40 divided by 78 is 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 7204.051282
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 14:
78 can be fit into 400 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 7204.05128205
If we subtract 390 from 400, 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.

The final outcome is 7204.05128205, with a leftover of 1e-08.