We look at the division of 993893 by 510 
The aim is to understand the frequency of 510 in 993893.

Step 1:
9 divided by 510 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 510

Step 2:
If we divide 99 by 510, we get 0 and a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Fetch the next digit (3) from the dividend, attach it to 99 and continue: 993 / 510

Let's proceed to step 3:
The number 510 fits into 993 1 times, leaving a remainder of 483.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 510 from 993 to get 483.
Grab the next digit (8) from the dividend, add it to 483, then carry on: 4838 / 510

Let's proceed to step 4:
The number 510 fits into 4838 9 times, leaving a remainder of 248.
Put 9 as the next digit of the answer. 
Result so far: 19.0
Deduct 4590 from 4838 and we're left with 248.
Append the next digit (9) from the dividend to 248 and continue with: 2489 / 510

Advancing to step 5:
The number 510 fits into 2489 4 times, leaving a remainder of 449.
Record the quotient 4 as the next digit in the result. 
Result so far: 194.0
Deduct 2040 from 2489 and we're left with 449.
Fetch the next digit (3) from the dividend, attach it to 449 and continue: 4493 / 510

Advancing to step 6:
When dividing 4493 by 510, we get 8 with a remainder of 413.
Record the quotient 8 as the next digit in the result. 
Result so far: 1948.0
Subtract 4080 from 4493 to get 413.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Moving on to step 7:
The number 510 fits into 4130 8 times, leaving a remainder of 50.
Use 8 as the next digit of our solution. 
Result so far: 1948.8
Deduct 4080 from 4130 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 8:
500 divided by 510 is 0 with a remainder of 500.
Use 0 as the next digit of our solution. 
Result so far: 1948.8
If we subtract 0 from 500, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

On to step 9:
510 goes into 5000 9 times with a remainder of 410.
Write down 9 as next digit of the result. 
Result so far: 1948.809
Subtracting 4590 from 5000 leaves us with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Let's proceed to step 10:
If we divide 4100 by 510, we get 8 and a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 1948.8098
If we take 4080 away from 4100, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
510 can be fit into 200 0 times, resulting in a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 1948.8098
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 12:
2000 divided by 510 is 3 with a remainder of 470.
Put 3 as the next digit of the answer. 
Result so far: 1948.809803
If we subtract 1530 from 2000, we get 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Step 13:
510 can be fit into 4700 9 times, resulting in a remainder of 110.
Record the quotient 9 as the next digit in the result. 
Result so far: 1948.8098039
If we subtract 4590 from 4700, we get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 14:
The number 510 fits into 1100 2 times, leaving a remainder of 80.
The next digit of our result is 2. 
Result so far: 1948.80980392
Deduct 1020 from 1100 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 1948.80980392, and the remainder is 8e-08.