80979640 divided by 524 
The aim is to understand the frequency of 524 in 80979640.

Step 1:
If we divide 8 by 524, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 524

Step 2:
When dividing 80 by 524, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Take the next digit (9) from the dividend and append it to 80, then repeat: 809 / 524

Moving on to step 3:
524 can be fit into 809 1 times, resulting in a remainder of 285.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 285 after subtracting 524 from 809.
Include the next digit (7) from the dividend after 285, then repeat: 2857 / 524

Going ahead to step 4:
524 can be fit into 2857 5 times, resulting in a remainder of 237.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 2620 from 2857 and we're left with 237.
Grab the next digit (9) from the dividend, add it to 237, then carry on: 2379 / 524

On to step 5:
524 goes into 2379 4 times with a remainder of 283.
The number 4 becomes the next digit in our result. 
Result so far: 154.0
The remainder is 283 after subtracting 2096 from 2379.
Grab the next digit (6) from the dividend, add it to 283, then carry on: 2836 / 524

Moving on to step 6:
524 can be fit into 2836 5 times, resulting in a remainder of 216.
The next digit of our result is 5. 
Result so far: 1545.0
Subtract 2620 from 2836 to get 216.
Take the next digit (4) from the dividend and append it to 216, then repeat: 2164 / 524

Let's proceed to step 7:
524 can be fit into 2164 4 times, resulting in a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 15454.0
If we subtract 2096 from 2164, we get 68.
Bring next digit (0) of the dividend behind the 68 and repeat the process: 680 / 524

On to step 8:
If we divide 680 by 524, we get 1 and a remainder of 156.
Put 1 as the next digit of the answer. 
Result so far: 154541.0
If we take 524 away from 680, we end up with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 9:
When dividing 1560 by 524, we get 2 with a remainder of 512.
The number 2 becomes the next digit in our result. 
Result so far: 154541.2
If we subtract 1048 from 1560, we get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Advancing to step 10:
524 goes into 5120 9 times with a remainder of 404.
Record the quotient 9 as the next digit in the result. 
Result so far: 154541.29
If we subtract 4716 from 5120, we get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Moving on to step 11:
When dividing 4040 by 524, we get 7 with a remainder of 372.
The number 7 becomes the next digit in our result. 
Result so far: 154541.297
If we take 3668 away from 4040, we end up with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Moving on to step 12:
3720 divided by 524 is 7 with a remainder of 52.
Record the quotient 7 as the next digit in the result. 
Result so far: 154541.2977
Deduct 3668 from 3720 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 154541.2977 and a remainder of 0.00052.