53017679 ÷ 781 
The aim is to understand the frequency of 781 in 53017679.

Going ahead to step 1:
If we divide 5 by 781, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 781

Moving on to step 2:
781 can be fit into 53 0 times, resulting in a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Bring next digit (0) of the dividend behind the 53 and repeat the process: 530 / 781

Let's proceed to step 3:
When dividing 530 by 781, we get 0 with a remainder of 530.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 530, we end up with 530.
Append the next digit (1) from the dividend to 530 and continue with: 5301 / 781

Going ahead to step 4:
When dividing 5301 by 781, we get 6 with a remainder of 615.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 4686 from 5301, we get 615.
Take the next digit (7) from the dividend and append it to 615, then repeat: 6157 / 781

Advancing to step 5:
781 goes into 6157 7 times with a remainder of 690.
Use 7 as the next digit of our solution. 
Result so far: 67.0
If we subtract 5467 from 6157, we get 690.
Bring next digit (6) of the dividend behind the 690 and repeat the process: 6906 / 781

Moving on to step 6:
When dividing 6906 by 781, we get 8 with a remainder of 658.
Use 8 as the next digit of our solution. 
Result so far: 678.0
Subtract 6248 from 6906 to get 658.
Append the next digit (7) from the dividend to 658 and continue with: 6587 / 781

Moving on to step 7:
When dividing 6587 by 781, we get 8 with a remainder of 339.
Write down 8 as next digit of the result. 
Result so far: 6788.0
Deduct 6248 from 6587 and we're left with 339.
Take the next digit (9) from the dividend and append it to 339, then repeat: 3399 / 781

Step 8:
3399 divided by 781 is 4 with a remainder of 275.
The number 4 becomes the next digit in our result. 
Result so far: 67884.0
The remainder is 275 after subtracting 3124 from 3399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 9:
2750 divided by 781 is 3 with a remainder of 407.
Record the quotient 3 as the next digit in the result. 
Result so far: 67884.3
Deduct 2343 from 2750 and we're left with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Going ahead to step 10:
If we divide 4070 by 781, we get 5 and a remainder of 165.
Record the quotient 5 as the next digit in the result. 
Result so far: 67884.35
The remainder is 165 after subtracting 3905 from 4070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Let's proceed to step 11:
781 goes into 1650 2 times with a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 67884.352
If we take 1562 away from 1650, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

On to step 12:
If we divide 880 by 781, we get 1 and a remainder of 99.
Use 1 as the next digit of our solution. 
Result so far: 67884.3521
Subtract 781 from 880 to get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Advancing to step 13:
781 goes into 990 1 times with a remainder of 209.
Put 1 as the next digit of the answer. 
Result so far: 67884.35211
Deduct 781 from 990 and we're left with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

After the division, we end up with 67884.35211 and a remainder of 0.000209.