We look at the division of 35630899 by 393 
The aim is to understand the frequency of 393 in 35630899.

Going ahead to step 1:
The number 393 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 393

Moving on to step 2:
35 divided by 393 is 0 with a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 35 to get 35.
Include the next digit (6) from the dividend after 35, then repeat: 356 / 393

Let's proceed to step 3:
When dividing 356 by 393, we get 0 with a remainder of 356.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 356 to get 356.
Take the next digit (3) from the dividend and append it to 356, then repeat: 3563 / 393

Let's proceed to step 4:
The number 393 fits into 3563 9 times, leaving a remainder of 26.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 3537 from 3563 leaves us with 26.
Fetch the next digit (0) from the dividend, attach it to 26 and continue: 260 / 393

Moving on to step 5:
393 can be fit into 260 0 times, resulting in a remainder of 260.
Put 0 as the next digit of the answer. 
Result so far: 90.0
If we take 0 away from 260, we end up with 260.
Include the next digit (8) from the dividend after 260, then repeat: 2608 / 393

On to step 6:
2608 divided by 393 is 6 with a remainder of 250.
Use 6 as the next digit of our solution. 
Result so far: 906.0
Deduct 2358 from 2608 and we're left with 250.
Include the next digit (9) from the dividend after 250, then repeat: 2509 / 393

Moving on to step 7:
When dividing 2509 by 393, we get 6 with a remainder of 151.
Write down 6 as next digit of the result. 
Result so far: 9066.0
The remainder is 151 after subtracting 2358 from 2509.
Fetch the next digit (9) from the dividend, attach it to 151 and continue: 1519 / 393

On to step 8:
393 can be fit into 1519 3 times, resulting in a remainder of 340.
Use 3 as the next digit of our solution. 
Result so far: 90663.0
If we take 1179 away from 1519, we end up with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 9:
393 goes into 3400 8 times with a remainder of 256.
The number 8 becomes the next digit in our result. 
Result so far: 90663.8
If we take 3144 away from 3400, we end up with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 10:
When dividing 2560 by 393, we get 6 with a remainder of 202.
The number 6 becomes the next digit in our result. 
Result so far: 90663.86
The remainder is 202 after subtracting 2358 from 2560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Let's proceed to step 11:
The number 393 fits into 2020 5 times, leaving a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 90663.865
Deduct 1965 from 2020 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 12:
393 goes into 550 1 times with a remainder of 157.
Use 1 as the next digit of our solution. 
Result so far: 90663.8651
If we take 393 away from 550, we end up with 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

Let's proceed to step 13:
The number 393 fits into 1570 3 times, leaving a remainder of 391.
Use 3 as the next digit of our solution. 
Result so far: 90663.86513
Subtract 1179 from 1570 to get 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

On to step 14:
The number 393 fits into 3910 9 times, leaving a remainder of 373.
The next digit of our result is 9. 
Result so far: 90663.865139
Subtracting 3537 from 3910 leaves us with 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Going ahead to step 15:
393 goes into 3730 9 times with a remainder of 193.
Put 9 as the next digit of the answer. 
Result so far: 90663.8651399
Deduct 3537 from 3730 and we're left with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

The final result is 90663.8651399 with a remainder of 1.93e-06.