79770971 ÷ 640 
The aim is to understand the frequency of 640 in 79770971.

On to step 1:
640 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 640

Advancing to step 2:
640 goes into 79 0 times with a remainder of 79.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Take the next digit (7) from the dividend and append it to 79, then repeat: 797 / 640

Let's proceed to step 3:
640 can be fit into 797 1 times, resulting in a remainder of 157.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 640 from 797 leaves us with 157.
Take the next digit (7) from the dividend and append it to 157, then repeat: 1577 / 640

Step 4:
The number 640 fits into 1577 2 times, leaving a remainder of 297.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we take 1280 away from 1577, we end up with 297.
Bring next digit (0) of the dividend behind the 297 and repeat the process: 2970 / 640

Advancing to step 5:
If we divide 2970 by 640, we get 4 and a remainder of 410.
Record the quotient 4 as the next digit in the result. 
Result so far: 124.0
Subtract 2560 from 2970 to get 410.
Grab the next digit (9) from the dividend, add it to 410, then carry on: 4109 / 640

Moving on to step 6:
640 goes into 4109 6 times with a remainder of 269.
The next digit of our result is 6. 
Result so far: 1246.0
Subtract 3840 from 4109 to get 269.
Append the next digit (7) from the dividend to 269 and continue with: 2697 / 640

On to step 7:
If we divide 2697 by 640, we get 4 and a remainder of 137.
Record the quotient 4 as the next digit in the result. 
Result so far: 12464.0
Subtract 2560 from 2697 to get 137.
Bring next digit (1) of the dividend behind the 137 and repeat the process: 1371 / 640

Step 8:
The number 640 fits into 1371 2 times, leaving a remainder of 91.
Put 2 as the next digit of the answer. 
Result so far: 124642.0
The remainder is 91 after subtracting 1280 from 1371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Moving on to step 9:
640 goes into 910 1 times with a remainder of 270.
Use 1 as the next digit of our solution. 
Result so far: 124642.1
Deduct 640 from 910 and we're left with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 10:
640 can be fit into 2700 4 times, resulting in a remainder of 140.
Use 4 as the next digit of our solution. 
Result so far: 124642.14
The remainder is 140 after subtracting 2560 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 11:
640 can be fit into 1400 2 times, resulting in a remainder of 120.
Use 2 as the next digit of our solution. 
Result so far: 124642.142
The remainder is 120 after subtracting 1280 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 12:
The number 640 fits into 1200 1 times, leaving a remainder of 560.
Put 1 as the next digit of the answer. 
Result so far: 124642.1421
Subtract 640 from 1200 to get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 13:
5600 divided by 640 is 8 with a remainder of 480.
Record the quotient 8 as the next digit in the result. 
Result so far: 124642.14218
The remainder is 480 after subtracting 5120 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 14:
When dividing 4800 by 640, we get 7 with a remainder of 320.
The next digit of our result is 7. 
Result so far: 124642.142187
If we subtract 4480 from 4800, 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.

Moving on to step 15:
If we divide 3200 by 640, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 124642.1421875
Subtract 3200 from 3200 to 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:
640 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 124642.1421875
The remainder is 0 after subtracting 0 from 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 124642.1421875 and a remainder of 0.0.