42339691 divided by 520 
The aim is to understand the frequency of 520 in 42339691.

Step 1:
If we divide 4 by 520, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 520

Let's proceed to step 2:
If we divide 42 by 520, we get 0 and a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 520

Step 3:
423 divided by 520 is 0 with a remainder of 423.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 423, we end up with 423.
Take the next digit (3) from the dividend and append it to 423, then repeat: 4233 / 520

Let's proceed to step 4:
520 goes into 4233 8 times with a remainder of 73.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 73 after subtracting 4160 from 4233.
Grab the next digit (9) from the dividend, add it to 73, then carry on: 739 / 520

Step 5:
The number 520 fits into 739 1 times, leaving a remainder of 219.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
The remainder is 219 after subtracting 520 from 739.
Take the next digit (6) from the dividend and append it to 219, then repeat: 2196 / 520

Step 6:
520 goes into 2196 4 times with a remainder of 116.
Write down 4 as next digit of the result. 
Result so far: 814.0
Subtracting 2080 from 2196 leaves us with 116.
Append the next digit (9) from the dividend to 116 and continue with: 1169 / 520

Going ahead to step 7:
520 can be fit into 1169 2 times, resulting in a remainder of 129.
The number 2 becomes the next digit in our result. 
Result so far: 8142.0
Subtract 1040 from 1169 to get 129.
Grab the next digit (1) from the dividend, add it to 129, then carry on: 1291 / 520

Moving on to step 8:
520 goes into 1291 2 times with a remainder of 251.
Record the quotient 2 as the next digit in the result. 
Result so far: 81422.0
Subtracting 1040 from 1291 leaves us with 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Going ahead to step 9:
520 goes into 2510 4 times with a remainder of 430.
Put 4 as the next digit of the answer. 
Result so far: 81422.4
Subtracting 2080 from 2510 leaves us with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 10:
If we divide 4300 by 520, we get 8 and a remainder of 140.
The number 8 becomes the next digit in our result. 
Result so far: 81422.48
Subtract 4160 from 4300 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 11:
520 goes into 1400 2 times with a remainder of 360.
The number 2 becomes the next digit in our result. 
Result so far: 81422.482
Subtracting 1040 from 1400 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 12:
The number 520 fits into 3600 6 times, leaving a remainder of 480.
Record the quotient 6 as the next digit in the result. 
Result so far: 81422.4826
The remainder is 480 after subtracting 3120 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 13:
If we divide 4800 by 520, we get 9 and a remainder of 120.
The number 9 becomes the next digit in our result. 
Result so far: 81422.48269
Deduct 4680 from 4800 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 14:
1200 divided by 520 is 2 with a remainder of 160.
Put 2 as the next digit of the answer. 
Result so far: 81422.482692
The remainder is 160 after subtracting 1040 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 15:
If we divide 1600 by 520, we get 3 and a remainder of 40.
Use 3 as the next digit of our solution. 
Result so far: 81422.4826923
Subtract 1560 from 1600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 16:
400 divided by 520 is 0 with a remainder of 400.
The number 0 becomes the next digit in our result. 
Result so far: 81422.4826923
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 81422.4826923, with a leftover of 4e-07.