We look at the division of 900556 by 68 
The aim is to understand the frequency of 68 in 900556.

On to step 1:
If we divide 9 by 68, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 68

Step 2:
If we divide 90 by 68, we get 1 and a remainder of 22.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 68 from 90 to get 22.
Include the next digit (0) from the dividend after 22, then repeat: 220 / 68

Step 3:
68 can be fit into 220 3 times, resulting in a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtracting 204 from 220 leaves us with 16.
Fetch the next digit (5) from the dividend, attach it to 16 and continue: 165 / 68

Advancing to step 4:
If we divide 165 by 68, we get 2 and a remainder of 29.
The next digit of our result is 2. 
Result so far: 132.0
If we subtract 136 from 165, we get 29.
Grab the next digit (5) from the dividend, add it to 29, then carry on: 295 / 68

On to step 5:
When dividing 295 by 68, we get 4 with a remainder of 23.
The next digit of our result is 4. 
Result so far: 1324.0
Deduct 272 from 295 and we're left with 23.
Fetch the next digit (6) from the dividend, attach it to 23 and continue: 236 / 68

On to step 6:
236 divided by 68 is 3 with a remainder of 32.
Write down 3 as next digit of the result. 
Result so far: 13243.0
If we take 204 away from 236, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 7:
When dividing 320 by 68, we get 4 with a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 13243.4
Subtract 272 from 320 to 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.

Going ahead to step 8:
68 goes into 480 7 times with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 13243.47
The remainder is 4 after subtracting 476 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
40 divided by 68 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 13243.47
Deduct 0 from 40 and we're left 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.

On to step 10:
The number 68 fits into 400 5 times, leaving a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 13243.4705
The remainder is 60 after subtracting 340 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 11:
68 can be fit into 600 8 times, resulting in a remainder of 56.
Put 8 as the next digit of the answer. 
Result so far: 13243.47058
If we subtract 544 from 600, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 12:
If we divide 560 by 68, we get 8 and a remainder of 16.
The next digit of our result is 8. 
Result so far: 13243.470588
Subtract 544 from 560 to 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.

The final outcome is 13243.470588, with a leftover of 1.6e-06.