We look at the division of 78648437 by 619 
The aim is to understand the frequency of 619 in 78648437.

Step 1:
When dividing 7 by 619, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 619

Advancing to step 2:
619 can be fit into 78 0 times, resulting in a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Include the next digit (6) from the dividend after 78, then repeat: 786 / 619

Going ahead to step 3:
When dividing 786 by 619, we get 1 with a remainder of 167.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 167 after subtracting 619 from 786.
Append the next digit (4) from the dividend to 167 and continue with: 1674 / 619

Advancing to step 4:
619 can be fit into 1674 2 times, resulting in a remainder of 436.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 1238 from 1674, we get 436.
Include the next digit (8) from the dividend after 436, then repeat: 4368 / 619

Advancing to step 5:
619 can be fit into 4368 7 times, resulting in a remainder of 35.
The next digit of our result is 7. 
Result so far: 127.0
Subtracting 4333 from 4368 leaves us with 35.
Include the next digit (4) from the dividend after 35, then repeat: 354 / 619

Going ahead to step 6:
619 goes into 354 0 times with a remainder of 354.
Record the quotient 0 as the next digit in the result. 
Result so far: 1270.0
Subtracting 0 from 354 leaves us with 354.
Fetch the next digit (3) from the dividend, attach it to 354 and continue: 3543 / 619

Moving on to step 7:
If we divide 3543 by 619, we get 5 and a remainder of 448.
The number 5 becomes the next digit in our result. 
Result so far: 12705.0
Subtract 3095 from 3543 to get 448.
Append the next digit (7) from the dividend to 448 and continue with: 4487 / 619

Let's proceed to step 8:
4487 divided by 619 is 7 with a remainder of 154.
The number 7 becomes the next digit in our result. 
Result so far: 127057.0
Subtract 4333 from 4487 to get 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Moving on to step 9:
If we divide 1540 by 619, we get 2 and a remainder of 302.
Record the quotient 2 as the next digit in the result. 
Result so far: 127057.2
If we take 1238 away from 1540, we end up with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Step 10:
When dividing 3020 by 619, we get 4 with a remainder of 544.
The next digit of our result is 4. 
Result so far: 127057.24
Deduct 2476 from 3020 and we're left with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Step 11:
619 can be fit into 5440 8 times, resulting in a remainder of 488.
Write down 8 as next digit of the result. 
Result so far: 127057.248
The remainder is 488 after subtracting 4952 from 5440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

On to step 12:
619 goes into 4880 7 times with a remainder of 547.
Put 7 as the next digit of the answer. 
Result so far: 127057.2487
Subtract 4333 from 4880 to get 547.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5470, and continue the process.

Let's proceed to step 13:
5470 divided by 619 is 8 with a remainder of 518.
Use 8 as the next digit of our solution. 
Result so far: 127057.24878
Subtracting 4952 from 5470 leaves us with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Advancing to step 14:
5180 divided by 619 is 8 with a remainder of 228.
Put 8 as the next digit of the answer. 
Result so far: 127057.248788
If we take 4952 away from 5180, we end up 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.

The final outcome is 127057.248788, with a leftover of 2.28e-05.