45939769 ÷ 640 
The aim is to understand the frequency of 640 in 45939769.

Advancing to step 1:
4 divided by 640 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 640

Going ahead to step 2:
640 can be fit into 45 0 times, resulting in a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Bring next digit (9) of the dividend behind the 45 and repeat the process: 459 / 640

Advancing to step 3:
459 divided by 640 is 0 with a remainder of 459.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 459 and we're left with 459.
Take the next digit (3) from the dividend and append it to 459, then repeat: 4593 / 640

Advancing to step 4:
If we divide 4593 by 640, we get 7 and a remainder of 113.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 4480 from 4593 and we're left with 113.
Include the next digit (9) from the dividend after 113, then repeat: 1139 / 640

Step 5:
When dividing 1139 by 640, we get 1 with a remainder of 499.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Subtract 640 from 1139 to get 499.
Include the next digit (7) from the dividend after 499, then repeat: 4997 / 640

Going ahead to step 6:
When dividing 4997 by 640, we get 7 with a remainder of 517.
Use 7 as the next digit of our solution. 
Result so far: 717.0
Subtract 4480 from 4997 to get 517.
Bring next digit (6) of the dividend behind the 517 and repeat the process: 5176 / 640

Let's proceed to step 7:
The number 640 fits into 5176 8 times, leaving a remainder of 56.
The number 8 becomes the next digit in our result. 
Result so far: 7178.0
Deduct 5120 from 5176 and we're left with 56.
Take the next digit (9) from the dividend and append it to 56, then repeat: 569 / 640

Moving on to step 8:
When dividing 569 by 640, we get 0 with a remainder of 569.
Put 0 as the next digit of the answer. 
Result so far: 71780.0
Deduct 0 from 569 and we're left with 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

Step 9:
If we divide 5690 by 640, we get 8 and a remainder of 570.
Use 8 as the next digit of our solution. 
Result so far: 71780.8
If we subtract 5120 from 5690, we get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Going ahead to step 10:
640 goes into 5700 8 times with a remainder of 580.
The number 8 becomes the next digit in our result. 
Result so far: 71780.88
Deduct 5120 from 5700 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

The final result is 71780.88 with a remainder of 0.58.