We look at the division of 73359757 by 640 
The aim is to understand the frequency of 640 in 73359757.

Advancing to step 1:
640 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 640

Moving on to step 2:
If we divide 73 by 640, we get 0 and a remainder of 73.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 73, we end up with 73.
Append the next digit (3) from the dividend to 73 and continue with: 733 / 640

Advancing to step 3:
733 divided by 640 is 1 with a remainder of 93.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 640 from 733 leaves us with 93.
Take the next digit (5) from the dividend and append it to 93, then repeat: 935 / 640

Moving on to step 4:
640 goes into 935 1 times with a remainder of 295.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 640 away from 935, we end up with 295.
Take the next digit (9) from the dividend and append it to 295, then repeat: 2959 / 640

Advancing to step 5:
When dividing 2959 by 640, we get 4 with a remainder of 399.
Use 4 as the next digit of our solution. 
Result so far: 114.0
If we take 2560 away from 2959, we end up with 399.
Take the next digit (7) from the dividend and append it to 399, then repeat: 3997 / 640

Advancing to step 6:
The number 640 fits into 3997 6 times, leaving a remainder of 157.
Use 6 as the next digit of our solution. 
Result so far: 1146.0
Deduct 3840 from 3997 and we're left with 157.
Grab the next digit (5) from the dividend, add it to 157, then carry on: 1575 / 640

Advancing to step 7:
1575 divided by 640 is 2 with a remainder of 295.
Record the quotient 2 as the next digit in the result. 
Result so far: 11462.0
Subtracting 1280 from 1575 leaves us with 295.
Fetch the next digit (7) from the dividend, attach it to 295 and continue: 2957 / 640

Step 8:
2957 divided by 640 is 4 with a remainder of 397.
The next digit of our result is 4. 
Result so far: 114624.0
If we take 2560 away from 2957, we end up with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Advancing to step 9:
640 can be fit into 3970 6 times, resulting in a remainder of 130.
Put 6 as the next digit of the answer. 
Result so far: 114624.6
If we subtract 3840 from 3970, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Moving on to step 10:
640 can be fit into 1300 2 times, resulting in a remainder of 20.
The next digit of our result is 2. 
Result so far: 114624.62
Subtract 1280 from 1300 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
640 can be fit into 200 0 times, resulting in a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 114624.62
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 12:
2000 divided by 640 is 3 with a remainder of 80.
Put 3 as the next digit of the answer. 
Result so far: 114624.6203
The remainder is 80 after subtracting 1920 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 13:
640 goes into 800 1 times with a remainder of 160.
Record the quotient 1 as the next digit in the result. 
Result so far: 114624.62031
If we subtract 640 from 800, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 14:
640 can be fit into 1600 2 times, resulting in a remainder of 320.
Use 2 as the next digit of our solution. 
Result so far: 114624.620312
If we subtract 1280 from 1600, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 15:
When dividing 3200 by 640, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 114624.6203125
Deduct 3200 from 3200 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.

Moving on to step 16:
0 divided by 640 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 114624.6203125
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.

The quotient of the division is 114624.6203125, and the remainder is 0.0.