688552 divided by 4 
The aim is to understand the frequency of 4 in 688552.

Step 1:
4 can be fit into 6 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 4 from 6, we get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 4

Step 2:
4 goes into 28 7 times with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
If we take 28 away from 28, we end up with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 4

On to step 3:
When dividing 8 by 4, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 172.0
Subtract 8 from 8 to get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 4

Going ahead to step 4:
4 goes into 5 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1721.0
Deduct 4 from 5 and we're left with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 4

On to step 5:
The number 4 fits into 15 3 times, leaving a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 17213.0
If we subtract 12 from 15, we get 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 4

Advancing to step 6:
When dividing 32 by 4, we get 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 172138.0
The remainder is 0 after subtracting 32 from 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
When dividing 0 by 4, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 172138.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 172138.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 172138.0 and a remainder of 0.0.