We're dividing 66366351 by 146 
The aim is to understand the frequency of 146 in 66366351.

Going ahead to step 1:
The number 146 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 146

On to step 2:
146 can be fit into 66 0 times, resulting in a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Grab the next digit (3) from the dividend, add it to 66, then carry on: 663 / 146

Moving on to step 3:
The number 146 fits into 663 4 times, leaving a remainder of 79.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 584 from 663 leaves us with 79.
Append the next digit (6) from the dividend to 79 and continue with: 796 / 146

Advancing to step 4:
If we divide 796 by 146, we get 5 and a remainder of 66.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
The remainder is 66 after subtracting 730 from 796.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 146

Going ahead to step 5:
666 divided by 146 is 4 with a remainder of 82.
Record the quotient 4 as the next digit in the result. 
Result so far: 454.0
Subtracting 584 from 666 leaves us with 82.
Fetch the next digit (3) from the dividend, attach it to 82 and continue: 823 / 146

Moving on to step 6:
146 goes into 823 5 times with a remainder of 93.
Write down 5 as next digit of the result. 
Result so far: 4545.0
The remainder is 93 after subtracting 730 from 823.
Bring next digit (5) of the dividend behind the 93 and repeat the process: 935 / 146

On to step 7:
The number 146 fits into 935 6 times, leaving a remainder of 59.
The next digit of our result is 6. 
Result so far: 45456.0
The remainder is 59 after subtracting 876 from 935.
Fetch the next digit (1) from the dividend, attach it to 59 and continue: 591 / 146

Going ahead to step 8:
146 goes into 591 4 times with a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 454564.0
If we take 584 away from 591, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 9:
146 can be fit into 70 0 times, resulting in a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 454564.0
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 10:
700 divided by 146 is 4 with a remainder of 116.
Record the quotient 4 as the next digit in the result. 
Result so far: 454564.04
The remainder is 116 after subtracting 584 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 11:
146 goes into 1160 7 times with a remainder of 138.
Use 7 as the next digit of our solution. 
Result so far: 454564.047
The remainder is 138 after subtracting 1022 from 1160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Moving on to step 12:
146 goes into 1380 9 times with a remainder of 66.
The next digit of our result is 9. 
Result so far: 454564.0479
The remainder is 66 after subtracting 1314 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 13:
The number 146 fits into 660 4 times, leaving a remainder of 76.
The next digit of our result is 4. 
Result so far: 454564.04794
Deduct 584 from 660 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 14:
The number 146 fits into 760 5 times, leaving a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 454564.047945
Subtract 730 from 760 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 15:
146 can be fit into 300 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 454564.0479452
If we take 292 away from 300, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 16:
If we divide 80 by 146, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 454564.0479452
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final outcome is 454564.0479452, with a leftover of 8e-08.