We look at the division of 64642142 by 38 
The aim is to understand the frequency of 38 in 64642142.

On to step 1:
When dividing 6 by 38, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 38

Going ahead to step 2:
38 goes into 64 1 times with a remainder of 26.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 38 from 64 and we're left with 26.
Fetch the next digit (6) from the dividend, attach it to 26 and continue: 266 / 38

Step 3:
38 can be fit into 266 7 times, resulting in a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 266 from 266 to get 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 38

Going ahead to step 4:
When dividing 4 by 38, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 170.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 38

Advancing to step 5:
38 can be fit into 42 1 times, resulting in a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 1701.0
Subtracting 38 from 42 leaves us with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 38

Going ahead to step 6:
If we divide 41 by 38, we get 1 and a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 17011.0
The remainder is 3 after subtracting 38 from 41.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 38

Moving on to step 7:
38 goes into 34 0 times with a remainder of 34.
Write down 0 as next digit of the result. 
Result so far: 170110.0
If we subtract 0 from 34, we get 34.
Fetch the next digit (2) from the dividend, attach it to 34 and continue: 342 / 38

Moving on to step 8:
If we divide 342 by 38, we get 9 and a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 1701109.0
Deduct 342 from 342 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.

Moving on to step 9:
0 divided by 38 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1701109.0
The remainder is 0 after subtracting 0 from 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 10:
38 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1701109.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 1701109.0 with a remaining 0.0.