We look at the division of 438143 by 88 
The aim is to understand the frequency of 88 in 438143.

Step 1:
88 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 88

Advancing to step 2:
If we divide 43 by 88, we get 0 and a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 43 after subtracting 0 from 43.
Include the next digit (8) from the dividend after 43, then repeat: 438 / 88

Let's proceed to step 3:
88 goes into 438 4 times with a remainder of 86.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 352 from 438, we get 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 88

On to step 4:
88 goes into 861 9 times with a remainder of 69.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
Deduct 792 from 861 and we're left with 69.
Fetch the next digit (4) from the dividend, attach it to 69 and continue: 694 / 88

Going ahead to step 5:
If we divide 694 by 88, we get 7 and a remainder of 78.
Record the quotient 7 as the next digit in the result. 
Result so far: 497.0
If we take 616 away from 694, we end up with 78.
Grab the next digit (3) from the dividend, add it to 78, then carry on: 783 / 88

Going ahead to step 6:
When dividing 783 by 88, we get 8 with a remainder of 79.
Put 8 as the next digit of the answer. 
Result so far: 4978.0
If we subtract 704 from 783, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 7:
If we divide 790 by 88, we get 8 and a remainder of 86.
Record the quotient 8 as the next digit in the result. 
Result so far: 4978.8
If we take 704 away from 790, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Going ahead to step 8:
88 can be fit into 860 9 times, resulting in a remainder of 68.
Record the quotient 9 as the next digit in the result. 
Result so far: 4978.89
If we subtract 792 from 860, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
680 divided by 88 is 7 with a remainder of 64.
The next digit of our result is 7. 
Result so far: 4978.897
If we subtract 616 from 680, we 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.

Moving on to step 10:
If we divide 640 by 88, we get 7 and a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 4978.8977
Subtract 616 from 640 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 4978.8977 with a remainder of 0.00024.