139290 ÷ 88 
The aim is to understand the frequency of 88 in 139290.

Step 1:
88 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 88

Moving on to step 2:
If we divide 13 by 88, we get 0 and a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 88

On to step 3:
139 divided by 88 is 1 with a remainder of 51.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 51 after subtracting 88 from 139.
Include the next digit (2) from the dividend after 51, then repeat: 512 / 88

Advancing to step 4:
If we divide 512 by 88, we get 5 and a remainder of 72.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 440 from 512 and we're left with 72.
Take the next digit (9) from the dividend and append it to 72, then repeat: 729 / 88

Going ahead to step 5:
88 goes into 729 8 times with a remainder of 25.
The number 8 becomes the next digit in our result. 
Result so far: 158.0
Subtracting 704 from 729 leaves us with 25.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 88

Step 6:
88 can be fit into 250 2 times, resulting in a remainder of 74.
Use 2 as the next digit of our solution. 
Result so far: 1582.0
Subtract 176 from 250 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 7:
88 can be fit into 740 8 times, resulting in a remainder of 36.
Put 8 as the next digit of the answer. 
Result so far: 1582.8
If we take 704 away from 740, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 8:
360 divided by 88 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 1582.84
If we take 352 away from 360, we end up 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.

On to step 9:
88 can be fit into 80 0 times, resulting in a remainder of 80.
The next digit of our result is 0. 
Result so far: 1582.84
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
800 divided by 88 is 9 with a remainder of 8.
The next digit of our result is 9. 
Result so far: 1582.8409
If we take 792 away from 800, we end up 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.

Going ahead to step 11:
88 can be fit into 80 0 times, resulting in a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 1582.8409
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 12:
If we divide 800 by 88, we get 9 and a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 1582.840909
If we subtract 792 from 800, 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.

Moving on to step 13:
The number 88 fits into 80 0 times, leaving a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 1582.840909
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 14:
800 divided by 88 is 9 with a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 1582.84090909
Deduct 792 from 800 and we're left 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.

After the division, we end up with 1582.84090909 and a remainder of 8e-09.