We divide 61850504 by 390
The aim is to understand the frequency of 390 in 61850504.

Step 1:
6 divided by 390 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 390

Advancing to step 2:
When dividing 61 by 390, we get 0 with a remainder of 61.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 61, we get 61.
Grab the next digit (8) from the dividend, add it to 61, then carry on: 618 / 390

Moving on to step 3:
618 divided by 390 is 1 with a remainder of 228.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 228 after subtracting 390 from 618.
Include the next digit (5) from the dividend after 228, then repeat: 2285 / 390

Let's proceed to step 4:
390 can be fit into 2285 5 times, resulting in a remainder of 335.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 335 after subtracting 1950 from 2285.
Append the next digit (0) from the dividend to 335 and continue with: 3350 / 390

Step 5:
390 can be fit into 3350 8 times, resulting in a remainder of 230.
Use 8 as the next digit of our solution. 
Result so far: 158.0
Subtracting 3120 from 3350 leaves us with 230.
Grab the next digit (5) from the dividend, add it to 230, then carry on: 2305 / 390

Let's proceed to step 6:
When dividing 2305 by 390, we get 5 with a remainder of 355.
The next digit of our result is 5. 
Result so far: 1585.0
If we subtract 1950 from 2305, we get 355.
Take the next digit (0) from the dividend and append it to 355, then repeat: 3550 / 390

Moving on to step 7:
3550 divided by 390 is 9 with a remainder of 40.
Record the quotient 9 as the next digit in the result. 
Result so far: 15859.0
The remainder is 40 after subtracting 3510 from 3550.
Fetch the next digit (4) from the dividend, attach it to 40 and continue: 404 / 390

Step 8:
390 can be fit into 404 1 times, resulting in a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 158591.0
If we take 390 away from 404, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
390 can be fit into 140 0 times, resulting in a remainder of 140.
Write down 0 as next digit of the result. 
Result so far: 158591.0
Deduct 0 from 140 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 10:
390 goes into 1400 3 times with a remainder of 230.
The next digit of our result is 3. 
Result so far: 158591.03
If we take 1170 away from 1400, we end up 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.

On to step 11:
When dividing 2300 by 390, we get 5 with a remainder of 350.
Write down 5 as next digit of the result. 
Result so far: 158591.035
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.

Moving on to step 12:
390 can be fit into 3500 8 times, resulting in a remainder of 380.
The next digit of our result is 8. 
Result so far: 158591.0358
If we take 3120 away from 3500, we end up 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.

Step 13:
3800 divided by 390 is 9 with a remainder of 290.
Write down 9 as next digit of the result. 
Result so far: 158591.03589
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.

Advancing to step 14:
If we divide 2900 by 390, we get 7 and a remainder of 170.
Use 7 as the next digit of our solution. 
Result so far: 158591.035897
The remainder is 170 after subtracting 2730 from 2900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 15:
If we divide 1700 by 390, we get 4 and a remainder of 140.
Write down 4 as next digit of the result. 
Result so far: 158591.0358974
Subtract 1560 from 1700 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.

Step 16:
The number 390 fits into 1400 3 times, leaving a remainder of 230.
Write down 3 as next digit of the result. 
Result so far: 158591.03589743
If we take 1170 away from 1400, we end up 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.

In conclusion, the division gives 158591.03589743 with a balance of 2.3e-07.