We're dividing 45165531 by 378 
The aim is to understand the frequency of 378 in 45165531.

Moving on to step 1:
378 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 378

On to step 2:
When dividing 45 by 378, we get 0 with a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Include the next digit (1) from the dividend after 45, then repeat: 451 / 378

Let's proceed to step 3:
If we divide 451 by 378, we get 1 and a remainder of 73.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 378 from 451 leaves us with 73.
Append the next digit (6) from the dividend to 73 and continue with: 736 / 378

Advancing to step 4:
If we divide 736 by 378, we get 1 and a remainder of 358.
The next digit of our result is 1. 
Result so far: 11.0
Subtracting 378 from 736 leaves us with 358.
Append the next digit (5) from the dividend to 358 and continue with: 3585 / 378

Moving on to step 5:
3585 divided by 378 is 9 with a remainder of 183.
Record the quotient 9 as the next digit in the result. 
Result so far: 119.0
If we take 3402 away from 3585, we end up with 183.
Take the next digit (5) from the dividend and append it to 183, then repeat: 1835 / 378

On to step 6:
The number 378 fits into 1835 4 times, leaving a remainder of 323.
The number 4 becomes the next digit in our result. 
Result so far: 1194.0
If we subtract 1512 from 1835, we get 323.
Take the next digit (3) from the dividend and append it to 323, then repeat: 3233 / 378

Advancing to step 7:
The number 378 fits into 3233 8 times, leaving a remainder of 209.
Put 8 as the next digit of the answer. 
Result so far: 11948.0
Deduct 3024 from 3233 and we're left with 209.
Take the next digit (1) from the dividend and append it to 209, then repeat: 2091 / 378

On to step 8:
When dividing 2091 by 378, we get 5 with a remainder of 201.
Put 5 as the next digit of the answer. 
Result so far: 119485.0
Subtract 1890 from 2091 to get 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Step 9:
378 goes into 2010 5 times with a remainder of 120.
Write down 5 as next digit of the result. 
Result so far: 119485.5
The remainder is 120 after subtracting 1890 from 2010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 10:
The number 378 fits into 1200 3 times, leaving a remainder of 66.
Put 3 as the next digit of the answer. 
Result so far: 119485.53
Deduct 1134 from 1200 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 11:
378 can be fit into 660 1 times, resulting in a remainder of 282.
Record the quotient 1 as the next digit in the result. 
Result so far: 119485.531
Subtract 378 from 660 to get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Let's proceed to step 12:
If we divide 2820 by 378, we get 7 and a remainder of 174.
Use 7 as the next digit of our solution. 
Result so far: 119485.5317
Subtract 2646 from 2820 to get 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Let's proceed to step 13:
The number 378 fits into 1740 4 times, leaving a remainder of 228.
Use 4 as the next digit of our solution. 
Result so far: 119485.53174
Deduct 1512 from 1740 and we're left with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 14:
2280 divided by 378 is 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 119485.531746
Subtracting 2268 from 2280 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 15:
When dividing 120 by 378, we get 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 119485.531746
Subtract 0 from 120 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 16:
The number 378 fits into 1200 3 times, leaving a remainder of 66.
Use 3 as the next digit of our solution. 
Result so far: 119485.53174603
Deduct 1134 from 1200 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

After the division, we end up with 119485.53174603 and a remainder of 6.6e-08.