We're dividing 97572175 by 640 
The aim is to understand the frequency of 640 in 97572175.

Step 1:
640 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 640

Moving on to step 2:
640 goes into 97 0 times with a remainder of 97.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 97 and we're left with 97.
Fetch the next digit (5) from the dividend, attach it to 97 and continue: 975 / 640

Moving on to step 3:
The number 640 fits into 975 1 times, leaving a remainder of 335.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 335 after subtracting 640 from 975.
Bring next digit (7) of the dividend behind the 335 and repeat the process: 3357 / 640

Let's proceed to step 4:
640 can be fit into 3357 5 times, resulting in a remainder of 157.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we take 3200 away from 3357, we end up with 157.
Append the next digit (2) from the dividend to 157 and continue with: 1572 / 640

Moving on to step 5:
The number 640 fits into 1572 2 times, leaving a remainder of 292.
Record the quotient 2 as the next digit in the result. 
Result so far: 152.0
Subtract 1280 from 1572 to get 292.
Fetch the next digit (1) from the dividend, attach it to 292 and continue: 2921 / 640

Moving on to step 6:
640 can be fit into 2921 4 times, resulting in a remainder of 361.
Use 4 as the next digit of our solution. 
Result so far: 1524.0
The remainder is 361 after subtracting 2560 from 2921.
Include the next digit (7) from the dividend after 361, then repeat: 3617 / 640

Moving on to step 7:
640 can be fit into 3617 5 times, resulting in a remainder of 417.
Write down 5 as next digit of the result. 
Result so far: 15245.0
Deduct 3200 from 3617 and we're left with 417.
Take the next digit (5) from the dividend and append it to 417, then repeat: 4175 / 640

On to step 8:
When dividing 4175 by 640, we get 6 with a remainder of 335.
Put 6 as the next digit of the answer. 
Result so far: 152456.0
Deduct 3840 from 4175 and we're left with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Going ahead to step 9:
640 goes into 3350 5 times with a remainder of 150.
The next digit of our result is 5. 
Result so far: 152456.5
Deduct 3200 from 3350 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 10:
640 goes into 1500 2 times with a remainder of 220.
Put 2 as the next digit of the answer. 
Result so far: 152456.52
Subtracting 1280 from 1500 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 11:
2200 divided by 640 is 3 with a remainder of 280.
The number 3 becomes the next digit in our result. 
Result so far: 152456.523
If we subtract 1920 from 2200, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 12:
2800 divided by 640 is 4 with a remainder of 240.
Use 4 as the next digit of our solution. 
Result so far: 152456.5234
Subtracting 2560 from 2800 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 13:
640 goes into 2400 3 times with a remainder of 480.
Use 3 as the next digit of our solution. 
Result so far: 152456.52343
The remainder is 480 after subtracting 1920 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 14:
640 goes into 4800 7 times with a remainder of 320.
Use 7 as the next digit of our solution. 
Result so far: 152456.523437
If we take 4480 away from 4800, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 15:
If we divide 3200 by 640, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 152456.5234375
The remainder is 0 after subtracting 3200 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 16:
If we divide 0 by 640, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 152456.5234375
If we take 0 away from 0, we end up 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.

Our division results in 152456.5234375 with a remaining 0.0.