We look at the division of 97776386 by 573 
The aim is to understand the frequency of 573 in 97776386.

Going ahead to step 1:
The number 573 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 573

Moving on to step 2:
573 can be fit into 97 0 times, resulting in a remainder of 97.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 97 to get 97.
Append the next digit (7) from the dividend to 97 and continue with: 977 / 573

Moving on to step 3:
573 goes into 977 1 times with a remainder of 404.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 573 away from 977, we end up with 404.
Append the next digit (7) from the dividend to 404 and continue with: 4047 / 573

On to step 4:
The number 573 fits into 4047 7 times, leaving a remainder of 36.
The next digit of our result is 7. 
Result so far: 17.0
Subtract 4011 from 4047 to get 36.
Include the next digit (6) from the dividend after 36, then repeat: 366 / 573

Moving on to step 5:
366 divided by 573 is 0 with a remainder of 366.
The number 0 becomes the next digit in our result. 
Result so far: 170.0
Deduct 0 from 366 and we're left with 366.
Append the next digit (3) from the dividend to 366 and continue with: 3663 / 573

Step 6:
If we divide 3663 by 573, we get 6 and a remainder of 225.
The next digit of our result is 6. 
Result so far: 1706.0
If we take 3438 away from 3663, we end up with 225.
Append the next digit (8) from the dividend to 225 and continue with: 2258 / 573

Let's proceed to step 7:
When dividing 2258 by 573, we get 3 with a remainder of 539.
Write down 3 as next digit of the result. 
Result so far: 17063.0
If we take 1719 away from 2258, we end up with 539.
Take the next digit (6) from the dividend and append it to 539, then repeat: 5396 / 573

Moving on to step 8:
The number 573 fits into 5396 9 times, leaving a remainder of 239.
Write down 9 as next digit of the result. 
Result so far: 170639.0
Subtracting 5157 from 5396 leaves us with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Let's proceed to step 9:
The number 573 fits into 2390 4 times, leaving a remainder of 98.
Put 4 as the next digit of the answer. 
Result so far: 170639.4
The remainder is 98 after subtracting 2292 from 2390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 10:
When dividing 980 by 573, we get 1 with a remainder of 407.
Put 1 as the next digit of the answer. 
Result so far: 170639.41
Subtracting 573 from 980 leaves us with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Advancing to step 11:
If we divide 4070 by 573, we get 7 and a remainder of 59.
Write down 7 as next digit of the result. 
Result so far: 170639.417
Deduct 4011 from 4070 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 12:
When dividing 590 by 573, we get 1 with a remainder of 17.
The next digit of our result is 1. 
Result so far: 170639.4171
If we subtract 573 from 590, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 13:
573 goes into 170 0 times with a remainder of 170.
The number 0 becomes the next digit in our result. 
Result so far: 170639.4171
The remainder is 170 after subtracting 0 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 14:
The number 573 fits into 1700 2 times, leaving a remainder of 554.
Use 2 as the next digit of our solution. 
Result so far: 170639.417102
Deduct 1146 from 1700 and we're left with 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Step 15:
573 can be fit into 5540 9 times, resulting in a remainder of 383.
The next digit of our result is 9. 
Result so far: 170639.4171029
If we take 5157 away from 5540, we end up with 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

Step 16:
When dividing 3830 by 573, we get 6 with a remainder of 392.
The number 6 becomes the next digit in our result. 
Result so far: 170639.41710296
Subtracting 3438 from 3830 leaves us with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

After the division, we end up with 170639.41710296 and a remainder of 3.92e-07.