We're dividing 12714560 by 390 
The aim is to understand the frequency of 390 in 12714560.

Step 1:
If we divide 1 by 390, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 390

Going ahead to step 2:
12 divided by 390 is 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Append the next digit (7) from the dividend to 12 and continue with: 127 / 390

Advancing to step 3:
If we divide 127 by 390, we get 0 and a remainder of 127.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 127 to get 127.
Bring next digit (1) of the dividend behind the 127 and repeat the process: 1271 / 390

On to step 4:
The number 390 fits into 1271 3 times, leaving a remainder of 101.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 1170 away from 1271, we end up with 101.
Append the next digit (4) from the dividend to 101 and continue with: 1014 / 390

Step 5:
390 can be fit into 1014 2 times, resulting in a remainder of 234.
Put 2 as the next digit of the answer. 
Result so far: 32.0
The remainder is 234 after subtracting 780 from 1014.
Take the next digit (5) from the dividend and append it to 234, then repeat: 2345 / 390

On to step 6:
390 can be fit into 2345 6 times, resulting in a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 326.0
The remainder is 5 after subtracting 2340 from 2345.
Take the next digit (6) from the dividend and append it to 5, then repeat: 56 / 390

Going ahead to step 7:
When dividing 56 by 390, we get 0 with a remainder of 56.
The next digit of our result is 0. 
Result so far: 3260.0
The remainder is 56 after subtracting 0 from 56.
Grab the next digit (0) from the dividend, add it to 56, then carry on: 560 / 390

Advancing to step 8:
560 divided by 390 is 1 with a remainder of 170.
Record the quotient 1 as the next digit in the result. 
Result so far: 32601.0
The remainder is 170 after subtracting 390 from 560.
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 9:
390 goes into 1700 4 times with a remainder of 140.
Write down 4 as next digit of the result. 
Result so far: 32601.4
If we subtract 1560 from 1700, we 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.

Moving on to step 10:
The number 390 fits into 1400 3 times, leaving a remainder of 230.
The number 3 becomes the next digit in our result. 
Result so far: 32601.43
If we subtract 1170 from 1400, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Let's proceed to step 11:
If we divide 2300 by 390, we get 5 and a remainder of 350.
The number 5 becomes the next digit in our result. 
Result so far: 32601.435
Deduct 1950 from 2300 and we're left with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Step 12:
If we divide 3500 by 390, we get 8 and a remainder of 380.
Use 8 as the next digit of our solution. 
Result so far: 32601.4358
Deduct 3120 from 3500 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Let's proceed to step 13:
390 can be fit into 3800 9 times, resulting in a remainder of 290.
Use 9 as the next digit of our solution. 
Result so far: 32601.43589
Deduct 3510 from 3800 and we're left with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Step 14:
2900 divided by 390 is 7 with a remainder of 170.
Put 7 as the next digit of the answer. 
Result so far: 32601.435897
Subtract 2730 from 2900 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 15:
1700 divided by 390 is 4 with a remainder of 140.
Put 4 as the next digit of the answer. 
Result so far: 32601.4358974
Deduct 1560 from 1700 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 16:
If we divide 1400 by 390, we get 3 and a remainder of 230.
Record the quotient 3 as the next digit in the result. 
Result so far: 32601.43589743
Subtracting 1170 from 1400 leaves us with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

The final outcome is 32601.43589743, with a leftover of 2.3e-07.