We look at the division of 74527527 by 390 
The aim is to understand the frequency of 390 in 74527527.

Moving on to step 1:
If we divide 7 by 390, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 390

Let's proceed to step 2:
390 can be fit into 74 0 times, resulting in a remainder of 74.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 74 to get 74.
Append the next digit (5) from the dividend to 74 and continue with: 745 / 390

Step 3:
390 goes into 745 1 times with a remainder of 355.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 390 away from 745, we end up with 355.
Append the next digit (2) from the dividend to 355 and continue with: 3552 / 390

On to step 4:
3552 divided by 390 is 9 with a remainder of 42.
Use 9 as the next digit of our solution. 
Result so far: 19.0
If we take 3510 away from 3552, we end up with 42.
Bring next digit (7) of the dividend behind the 42 and repeat the process: 427 / 390

Going ahead to step 5:
390 can be fit into 427 1 times, resulting in a remainder of 37.
Write down 1 as next digit of the result. 
Result so far: 191.0
If we take 390 away from 427, we end up with 37.
Include the next digit (5) from the dividend after 37, then repeat: 375 / 390

Going ahead to step 6:
The number 390 fits into 375 0 times, leaving a remainder of 375.
The next digit of our result is 0. 
Result so far: 1910.0
If we take 0 away from 375, we end up with 375.
Bring next digit (2) of the dividend behind the 375 and repeat the process: 3752 / 390

Moving on to step 7:
When dividing 3752 by 390, we get 9 with a remainder of 242.
Write down 9 as next digit of the result. 
Result so far: 19109.0
If we take 3510 away from 3752, we end up with 242.
Fetch the next digit (7) from the dividend, attach it to 242 and continue: 2427 / 390

Step 8:
2427 divided by 390 is 6 with a remainder of 87.
Use 6 as the next digit of our solution. 
Result so far: 191096.0
If we take 2340 away from 2427, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Advancing to step 9:
390 goes into 870 2 times with a remainder of 90.
Put 2 as the next digit of the answer. 
Result so far: 191096.2
If we subtract 780 from 870, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 10:
390 can be fit into 900 2 times, resulting in a remainder of 120.
Use 2 as the next digit of our solution. 
Result so far: 191096.22
If we take 780 away from 900, we end up 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.

The final outcome is 191096.22, with a leftover of 0.12.