66945565 divided by 148 
The aim is to understand the frequency of 148 in 66945565.

On to step 1:
148 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 148

Step 2:
The number 148 fits into 66 0 times, leaving a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (9) from the dividend and append it to 66, then repeat: 669 / 148

Let's proceed to step 3:
The number 148 fits into 669 4 times, leaving a remainder of 77.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 592 from 669 to get 77.
Take the next digit (4) from the dividend and append it to 77, then repeat: 774 / 148

Advancing to step 4:
If we divide 774 by 148, we get 5 and a remainder of 34.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
Subtract 740 from 774 to get 34.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 148

Step 5:
If we divide 345 by 148, we get 2 and a remainder of 49.
The next digit of our result is 2. 
Result so far: 452.0
If we take 296 away from 345, we end up with 49.
Fetch the next digit (5) from the dividend, attach it to 49 and continue: 495 / 148

Let's proceed to step 6:
If we divide 495 by 148, we get 3 and a remainder of 51.
Use 3 as the next digit of our solution. 
Result so far: 4523.0
If we take 444 away from 495, we end up with 51.
Grab the next digit (6) from the dividend, add it to 51, then carry on: 516 / 148

Advancing to step 7:
When dividing 516 by 148, we get 3 with a remainder of 72.
Record the quotient 3 as the next digit in the result. 
Result so far: 45233.0
The remainder is 72 after subtracting 444 from 516.
Include the next digit (5) from the dividend after 72, then repeat: 725 / 148

Step 8:
148 can be fit into 725 4 times, resulting in a remainder of 133.
Record the quotient 4 as the next digit in the result. 
Result so far: 452334.0
Subtract 592 from 725 to get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Advancing to step 9:
148 can be fit into 1330 8 times, resulting in a remainder of 146.
The next digit of our result is 8. 
Result so far: 452334.8
Subtracting 1184 from 1330 leaves us with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Step 10:
If we divide 1460 by 148, we get 9 and a remainder of 128.
Use 9 as the next digit of our solution. 
Result so far: 452334.89
Subtracting 1332 from 1460 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 11:
The number 148 fits into 1280 8 times, leaving a remainder of 96.
Write down 8 as next digit of the result. 
Result so far: 452334.898
If we subtract 1184 from 1280, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Going ahead to step 12:
If we divide 960 by 148, we get 6 and a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 452334.8986
If we subtract 888 from 960, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 13:
The number 148 fits into 720 4 times, leaving a remainder of 128.
The next digit of our result is 4. 
Result so far: 452334.89864
Subtract 592 from 720 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 14:
If we divide 1280 by 148, we get 8 and a remainder of 96.
Use 8 as the next digit of our solution. 
Result so far: 452334.898648
The remainder is 96 after subtracting 1184 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 15:
148 goes into 960 6 times with a remainder of 72.
The next digit of our result is 6. 
Result so far: 452334.8986486
Subtracting 888 from 960 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 16:
148 can be fit into 720 4 times, resulting in a remainder of 128.
Write down 4 as next digit of the result. 
Result so far: 452334.89864864
Subtracting 592 from 720 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The final outcome is 452334.89864864, with a leftover of 1.28e-07.