We look at the division of 75987249 by 640 
The aim is to understand the frequency of 640 in 75987249.

Step 1:
7 divided by 640 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 640

Let's proceed to step 2:
The number 640 fits into 75 0 times, leaving a remainder of 75.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 75 and we're left with 75.
Bring next digit (9) of the dividend behind the 75 and repeat the process: 759 / 640

Moving on to step 3:
640 can be fit into 759 1 times, resulting in a remainder of 119.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 640 away from 759, we end up with 119.
Bring next digit (8) of the dividend behind the 119 and repeat the process: 1198 / 640

Going ahead to step 4:
The number 640 fits into 1198 1 times, leaving a remainder of 558.
Write down 1 as next digit of the result. 
Result so far: 11.0
The remainder is 558 after subtracting 640 from 1198.
Grab the next digit (7) from the dividend, add it to 558, then carry on: 5587 / 640

On to step 5:
5587 divided by 640 is 8 with a remainder of 467.
Write down 8 as next digit of the result. 
Result so far: 118.0
Subtracting 5120 from 5587 leaves us with 467.
Fetch the next digit (2) from the dividend, attach it to 467 and continue: 4672 / 640

Step 6:
640 can be fit into 4672 7 times, resulting in a remainder of 192.
Write down 7 as next digit of the result. 
Result so far: 1187.0
If we take 4480 away from 4672, we end up with 192.
Fetch the next digit (4) from the dividend, attach it to 192 and continue: 1924 / 640

Step 7:
If we divide 1924 by 640, we get 3 and a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 11873.0
Deduct 1920 from 1924 and we're left with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 640

Moving on to step 8:
If we divide 49 by 640, we get 0 and a remainder of 49.
The number 0 becomes the next digit in our result. 
Result so far: 118730.0
Subtracting 0 from 49 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 9:
640 goes into 490 0 times with a remainder of 490.
The next digit of our result is 0. 
Result so far: 118730.0
If we subtract 0 from 490, we get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Let's proceed to step 10:
If we divide 4900 by 640, we get 7 and a remainder of 420.
Write down 7 as next digit of the result. 
Result so far: 118730.07
Deduct 4480 from 4900 and we're left with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Advancing to step 11:
If we divide 4200 by 640, we get 6 and a remainder of 360.
Write down 6 as next digit of the result. 
Result so far: 118730.076
Deduct 3840 from 4200 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 12:
When dividing 3600 by 640, we get 5 with a remainder of 400.
Use 5 as the next digit of our solution. 
Result so far: 118730.0765
If we take 3200 away from 3600, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 13:
The number 640 fits into 4000 6 times, leaving a remainder of 160.
The next digit of our result is 6. 
Result so far: 118730.07656
Subtracting 3840 from 4000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 14:
The number 640 fits into 1600 2 times, leaving a remainder of 320.
Write down 2 as next digit of the result. 
Result so far: 118730.076562
If we take 1280 away from 1600, 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:
640 goes into 3200 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 118730.0765625
If we subtract 3200 from 3200, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 16:
The number 640 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 118730.0765625
Deduct 0 from 0 and we're left 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.

After the division, we end up with 118730.0765625 and a remainder of 0.0.