We're dividing 900996 by 78 
The aim is to understand the frequency of 78 in 900996.

Moving on to step 1:
9 divided by 78 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 78

On to step 2:
78 can be fit into 90 1 times, resulting in a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 78 from 90 and we're left with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 78

On to step 3:
120 divided by 78 is 1 with a remainder of 42.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 78 from 120 to get 42.
Take the next digit (9) from the dividend and append it to 42, then repeat: 429 / 78

Step 4:
If we divide 429 by 78, we get 5 and a remainder of 39.
Write down 5 as next digit of the result. 
Result so far: 115.0
The remainder is 39 after subtracting 390 from 429.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 78

Going ahead to step 5:
78 can be fit into 399 5 times, resulting in a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 1155.0
If we subtract 390 from 399, we get 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 78

Moving on to step 6:
The number 78 fits into 96 1 times, leaving a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 11551.0
If we take 78 away from 96, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 7:
78 can be fit into 180 2 times, resulting in a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 11551.2
Subtract 156 from 180 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 8:
If we divide 240 by 78, we get 3 and a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 11551.23
Subtracting 234 from 240 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 9:
If we divide 60 by 78, we get 0 and a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 11551.23
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 10:
78 can be fit into 600 7 times, resulting in a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 11551.2307
If we take 546 away from 600, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 11:
78 can be fit into 540 6 times, resulting in a remainder of 72.
Write down 6 as next digit of the result. 
Result so far: 11551.23076
If we subtract 468 from 540, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 12:
78 can be fit into 720 9 times, resulting in a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 11551.230769
If we take 702 away from 720, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 13:
The number 78 fits into 180 2 times, leaving a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 11551.2307692
Subtract 156 from 180 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 14:
78 can be fit into 240 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 11551.23076923
If we subtract 234 from 240, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 11551.23076923, with a leftover of 6e-09.