688664 divided by 38 
The aim is to understand the frequency of 38 in 688664.

Going ahead to step 1:
When dividing 6 by 38, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 38

On to step 2:
The number 38 fits into 68 1 times, leaving a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 38 from 68, we get 30.
Grab the next digit (8) from the dividend, add it to 30, then carry on: 308 / 38

Step 3:
308 divided by 38 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Subtracting 304 from 308 leaves us with 4.
Take the next digit (6) from the dividend and append it to 4, then repeat: 46 / 38

Let's proceed to step 4:
38 goes into 46 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 181.0
The remainder is 8 after subtracting 38 from 46.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 38

On to step 5:
86 divided by 38 is 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 1812.0
Subtract 76 from 86 to get 10.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 38

Advancing to step 6:
38 goes into 104 2 times with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 18122.0
Subtract 76 from 104 to 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.

Moving on to step 7:
If we divide 280 by 38, we get 7 and a remainder of 14.
The next digit of our result is 7. 
Result so far: 18122.7
Deduct 266 from 280 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 8:
38 can be fit into 140 3 times, resulting in a remainder of 26.
Write down 3 as next digit of the result. 
Result so far: 18122.73
If we take 114 away from 140, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 9:
The number 38 fits into 260 6 times, leaving a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 18122.736
The remainder is 32 after subtracting 228 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 10:
If we divide 320 by 38, we get 8 and a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 18122.7368
Subtract 304 from 320 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.

Let's proceed to step 11:
160 divided by 38 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 18122.73684
Subtracting 152 from 160 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
38 can be fit into 80 2 times, resulting in a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 18122.736842
Subtract 76 from 80 to get 4.
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 13:
38 goes into 40 1 times with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 18122.7368421
Subtracting 38 from 40 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
When dividing 20 by 38, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 18122.7368421
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 18122.7368421 with a remainder of 2e-08.