55936490 divided by 390 
The aim is to understand the frequency of 390 in 55936490.

Step 1:
390 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 390

Advancing to step 2:
When dividing 55 by 390, we get 0 with a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 55 and we're left with 55.
Include the next digit (9) from the dividend after 55, then repeat: 559 / 390

Moving on to step 3:
559 divided by 390 is 1 with a remainder of 169.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 390 from 559 leaves us with 169.
Append the next digit (3) from the dividend to 169 and continue with: 1693 / 390

Moving on to step 4:
If we divide 1693 by 390, we get 4 and a remainder of 133.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 1560 from 1693 and we're left with 133.
Grab the next digit (6) from the dividend, add it to 133, then carry on: 1336 / 390

Going ahead to step 5:
When dividing 1336 by 390, we get 3 with a remainder of 166.
Write down 3 as next digit of the result. 
Result so far: 143.0
The remainder is 166 after subtracting 1170 from 1336.
Append the next digit (4) from the dividend to 166 and continue with: 1664 / 390

Moving on to step 6:
When dividing 1664 by 390, we get 4 with a remainder of 104.
Use 4 as the next digit of our solution. 
Result so far: 1434.0
If we take 1560 away from 1664, we end up with 104.
Grab the next digit (9) from the dividend, add it to 104, then carry on: 1049 / 390

Step 7:
390 can be fit into 1049 2 times, resulting in a remainder of 269.
The next digit of our result is 2. 
Result so far: 14342.0
If we take 780 away from 1049, we end up with 269.
Grab the next digit (0) from the dividend, add it to 269, then carry on: 2690 / 390

On to step 8:
The number 390 fits into 2690 6 times, leaving a remainder of 350.
The next digit of our result is 6. 
Result so far: 143426.0
If we subtract 2340 from 2690, we get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 9:
If we divide 3500 by 390, we get 8 and a remainder of 380.
Record the quotient 8 as the next digit in the result. 
Result so far: 143426.8
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.

Moving on to step 10:
390 goes into 3800 9 times with a remainder of 290.
The next digit of our result is 9. 
Result so far: 143426.89
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.

On to step 11:
When dividing 2900 by 390, we get 7 with a remainder of 170.
Use 7 as the next digit of our solution. 
Result so far: 143426.897
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.

Let's proceed to step 12:
1700 divided by 390 is 4 with a remainder of 140.
Record the quotient 4 as the next digit in the result. 
Result so far: 143426.8974
The remainder is 140 after subtracting 1560 from 1700.
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 13:
The number 390 fits into 1400 3 times, leaving a remainder of 230.
Use 3 as the next digit of our solution. 
Result so far: 143426.89743
The remainder is 230 after subtracting 1170 from 1400.
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 14:
390 can be fit into 2300 5 times, resulting in a remainder of 350.
The next digit of our result is 5. 
Result so far: 143426.897435
If we take 1950 away from 2300, we end up 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 15:
3500 divided by 390 is 8 with a remainder of 380.
The next digit of our result is 8. 
Result so far: 143426.8974358
The remainder is 380 after subtracting 3120 from 3500.
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 16:
When dividing 3800 by 390, we get 9 with a remainder of 290.
Record the quotient 9 as the next digit in the result. 
Result so far: 143426.89743589
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.

The final result is 143426.89743589 with a remainder of 2.9e-07.