We divide 643719 by 88
The aim is to understand the frequency of 88 in 643719.

On to step 1:
6 divided by 88 is 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 (4) from the dividend after 6, then repeat: 64 / 88

Advancing to step 2:
88 goes into 64 0 times with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Append the next digit (3) from the dividend to 64 and continue with: 643 / 88

Let's proceed to step 3:
When dividing 643 by 88, we get 7 with a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 616 from 643 and we're left with 27.
Fetch the next digit (7) from the dividend, attach it to 27 and continue: 277 / 88

On to step 4:
If we divide 277 by 88, we get 3 and a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 73.0
Subtracting 264 from 277 leaves us with 13.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 88

Step 5:
When dividing 131 by 88, we get 1 with a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 731.0
The remainder is 43 after subtracting 88 from 131.
Bring next digit (9) of the dividend behind the 43 and repeat the process: 439 / 88

Moving on to step 6:
88 goes into 439 4 times with a remainder of 87.
Write down 4 as next digit of the result. 
Result so far: 7314.0
The remainder is 87 after subtracting 352 from 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Let's proceed to step 7:
870 divided by 88 is 9 with a remainder of 78.
Put 9 as the next digit of the answer. 
Result so far: 7314.9
Subtracting 792 from 870 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 8:
When dividing 780 by 88, we get 8 with a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 7314.98
If we take 704 away from 780, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 9:
88 goes into 760 8 times with a remainder of 56.
The number 8 becomes the next digit in our result. 
Result so far: 7314.988
Subtract 704 from 760 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The quotient of the division is 7314.988, and the remainder is 0.0056.