We look at the division of 37234357 by 573 
The aim is to understand the frequency of 573 in 37234357.

On to step 1:
If we divide 3 by 573, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 573

Advancing to step 2:
When dividing 37 by 573, we get 0 with a remainder of 37.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 37 leaves us with 37.
Append the next digit (2) from the dividend to 37 and continue with: 372 / 573

Advancing to step 3:
The number 573 fits into 372 0 times, leaving a remainder of 372.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 372, we get 372.
Grab the next digit (3) from the dividend, add it to 372, then carry on: 3723 / 573

Step 4:
3723 divided by 573 is 6 with a remainder of 285.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 3438 from 3723 leaves us with 285.
Append the next digit (4) from the dividend to 285 and continue with: 2854 / 573

On to step 5:
573 goes into 2854 4 times with a remainder of 562.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Subtract 2292 from 2854 to get 562.
Grab the next digit (3) from the dividend, add it to 562, then carry on: 5623 / 573

Advancing to step 6:
When dividing 5623 by 573, we get 9 with a remainder of 466.
The next digit of our result is 9. 
Result so far: 649.0
Subtract 5157 from 5623 to get 466.
Grab the next digit (5) from the dividend, add it to 466, then carry on: 4665 / 573

Let's proceed to step 7:
573 goes into 4665 8 times with a remainder of 81.
Record the quotient 8 as the next digit in the result. 
Result so far: 6498.0
If we take 4584 away from 4665, we end up with 81.
Append the next digit (7) from the dividend to 81 and continue with: 817 / 573

On to step 8:
573 can be fit into 817 1 times, resulting in a remainder of 244.
Record the quotient 1 as the next digit in the result. 
Result so far: 64981.0
Subtracting 573 from 817 leaves us with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

On to step 9:
If we divide 2440 by 573, we get 4 and a remainder of 148.
Put 4 as the next digit of the answer. 
Result so far: 64981.4
If we take 2292 away from 2440, we end up with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Going ahead to step 10:
1480 divided by 573 is 2 with a remainder of 334.
Use 2 as the next digit of our solution. 
Result so far: 64981.42
Deduct 1146 from 1480 and we're left with 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Let's proceed to step 11:
The number 573 fits into 3340 5 times, leaving a remainder of 475.
Use 5 as the next digit of our solution. 
Result so far: 64981.425
The remainder is 475 after subtracting 2865 from 3340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Moving on to step 12:
If we divide 4750 by 573, we get 8 and a remainder of 166.
Record the quotient 8 as the next digit in the result. 
Result so far: 64981.4258
If we subtract 4584 from 4750, we get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 13:
1660 divided by 573 is 2 with a remainder of 514.
The number 2 becomes the next digit in our result. 
Result so far: 64981.42582
The remainder is 514 after subtracting 1146 from 1660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

Going ahead to step 14:
If we divide 5140 by 573, we get 8 and a remainder of 556.
Write down 8 as next digit of the result. 
Result so far: 64981.425828
The remainder is 556 after subtracting 4584 from 5140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Advancing to step 15:
If we divide 5560 by 573, we get 9 and a remainder of 403.
Put 9 as the next digit of the answer. 
Result so far: 64981.4258289
Deduct 5157 from 5560 and we're left with 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Step 16:
When dividing 4030 by 573, we get 7 with a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 64981.42582897
Deduct 4011 from 4030 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final result is 64981.42582897 with a remainder of 1.9e-08.