We look at the division of 689880 by 68 
The aim is to understand the frequency of 68 in 689880.

Step 1:
68 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 68

Advancing to step 2:
68 goes into 68 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 68 away from 68, we end up with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 68

Moving on to step 3:
68 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 9, we end up with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 68

Moving on to step 4:
If we divide 98 by 68, we get 1 and a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 101.0
The remainder is 30 after subtracting 68 from 98.
Grab the next digit (8) from the dividend, add it to 30, then carry on: 308 / 68

Advancing to step 5:
If we divide 308 by 68, we get 4 and a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 1014.0
Subtracting 272 from 308 leaves us with 36.
Append the next digit (0) from the dividend to 36 and continue with: 360 / 68

On to step 6:
When dividing 360 by 68, we get 5 with a remainder of 20.
The next digit of our result is 5. 
Result so far: 10145.0
Subtract 340 from 360 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 7:
When dividing 200 by 68, we get 2 with a remainder of 64.
The next digit of our result is 2. 
Result so far: 10145.2
Subtract 136 from 200 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 8:
68 goes into 640 9 times with a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 10145.29
If we subtract 612 from 640, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
280 divided by 68 is 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 10145.294
If we subtract 272 from 280, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 10:
If we divide 80 by 68, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 10145.2941
If we take 68 away from 80, we end up 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.

Advancing to step 11:
68 goes into 120 1 times with a remainder of 52.
The next digit of our result is 1. 
Result so far: 10145.29411
If we subtract 68 from 120, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 10145.29411 and a remainder of 5.2e-05.