We're dividing 76191092 by 378 
The aim is to understand the frequency of 378 in 76191092.

Going ahead to step 1:
If we divide 7 by 378, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 378

Let's proceed to step 2:
76 divided by 378 is 0 with a remainder of 76.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Fetch the next digit (1) from the dividend, attach it to 76 and continue: 761 / 378

Let's proceed to step 3:
378 goes into 761 2 times with a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 756 from 761, we get 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 378

Let's proceed to step 4:
When dividing 59 by 378, we get 0 with a remainder of 59.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 59 to get 59.
Grab the next digit (1) from the dividend, add it to 59, then carry on: 591 / 378

Let's proceed to step 5:
When dividing 591 by 378, we get 1 with a remainder of 213.
The next digit of our result is 1. 
Result so far: 201.0
Subtracting 378 from 591 leaves us with 213.
Grab the next digit (0) from the dividend, add it to 213, then carry on: 2130 / 378

Step 6:
If we divide 2130 by 378, we get 5 and a remainder of 240.
Put 5 as the next digit of the answer. 
Result so far: 2015.0
If we subtract 1890 from 2130, we get 240.
Grab the next digit (9) from the dividend, add it to 240, then carry on: 2409 / 378

On to step 7:
378 can be fit into 2409 6 times, resulting in a remainder of 141.
The next digit of our result is 6. 
Result so far: 20156.0
If we subtract 2268 from 2409, we get 141.
Take the next digit (2) from the dividend and append it to 141, then repeat: 1412 / 378

Advancing to step 8:
1412 divided by 378 is 3 with a remainder of 278.
Use 3 as the next digit of our solution. 
Result so far: 201563.0
Deduct 1134 from 1412 and we're left with 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Going ahead to step 9:
378 goes into 2780 7 times with a remainder of 134.
The next digit of our result is 7. 
Result so far: 201563.7
The remainder is 134 after subtracting 2646 from 2780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Step 10:
1340 divided by 378 is 3 with a remainder of 206.
The next digit of our result is 3. 
Result so far: 201563.73
Subtracting 1134 from 1340 leaves us with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Step 11:
378 can be fit into 2060 5 times, resulting in a remainder of 170.
The number 5 becomes the next digit in our result. 
Result so far: 201563.735
Subtracting 1890 from 2060 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 12:
When dividing 1700 by 378, we get 4 with a remainder of 188.
Write down 4 as next digit of the result. 
Result so far: 201563.7354
If we subtract 1512 from 1700, we get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Going ahead to step 13:
378 can be fit into 1880 4 times, resulting in a remainder of 368.
The number 4 becomes the next digit in our result. 
Result so far: 201563.73544
Subtracting 1512 from 1880 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

After the division, we end up with 201563.73544 and a remainder of 0.000368.