75642605 ÷ 438 
The aim is to understand the frequency of 438 in 75642605.

On to step 1:
The number 438 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 438

Moving on to step 2:
If we divide 75 by 438, we get 0 and a remainder of 75.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 75, we get 75.
Bring next digit (6) of the dividend behind the 75 and repeat the process: 756 / 438

Going ahead to step 3:
When dividing 756 by 438, we get 1 with a remainder of 318.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 438 from 756 to get 318.
Append the next digit (4) from the dividend to 318 and continue with: 3184 / 438

Let's proceed to step 4:
3184 divided by 438 is 7 with a remainder of 118.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
The remainder is 118 after subtracting 3066 from 3184.
Include the next digit (2) from the dividend after 118, then repeat: 1182 / 438

Step 5:
The number 438 fits into 1182 2 times, leaving a remainder of 306.
Record the quotient 2 as the next digit in the result. 
Result so far: 172.0
The remainder is 306 after subtracting 876 from 1182.
Append the next digit (6) from the dividend to 306 and continue with: 3066 / 438

Advancing to step 6:
The number 438 fits into 3066 7 times, leaving a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 1727.0
Subtract 3066 from 3066 to get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 438

Going ahead to step 7:
0 divided by 438 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17270.0
Subtract 0 from 0 to get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 438

Let's proceed to step 8:
438 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 172700.0
If we take 0 away from 5, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
438 goes into 50 0 times with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 172700.0
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
The number 438 fits into 500 1 times, leaving a remainder of 62.
The number 1 becomes the next digit in our result. 
Result so far: 172700.01
Deduct 438 from 500 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 11:
If we divide 620 by 438, we get 1 and a remainder of 182.
Use 1 as the next digit of our solution. 
Result so far: 172700.011
If we take 438 away from 620, we end up with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

The final result is 172700.011 with a remainder of 0.0182.