50698815 ÷ 649 
The aim is to understand the frequency of 649 in 50698815.

On to step 1:
649 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 649

Advancing to step 2:
50 divided by 649 is 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 50, we end up with 50.
Append the next digit (6) from the dividend to 50 and continue with: 506 / 649

On to step 3:
649 can be fit into 506 0 times, resulting in a remainder of 506.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 506 after subtracting 0 from 506.
Take the next digit (9) from the dividend and append it to 506, then repeat: 5069 / 649

On to step 4:
649 goes into 5069 7 times with a remainder of 526.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 4543 from 5069 and we're left with 526.
Include the next digit (8) from the dividend after 526, then repeat: 5268 / 649

Step 5:
When dividing 5268 by 649, we get 8 with a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
Deduct 5192 from 5268 and we're left with 76.
Bring next digit (8) of the dividend behind the 76 and repeat the process: 768 / 649

Advancing to step 6:
649 can be fit into 768 1 times, resulting in a remainder of 119.
The number 1 becomes the next digit in our result. 
Result so far: 781.0
If we subtract 649 from 768, we get 119.
Grab the next digit (1) from the dividend, add it to 119, then carry on: 1191 / 649

Let's proceed to step 7:
The number 649 fits into 1191 1 times, leaving a remainder of 542.
Put 1 as the next digit of the answer. 
Result so far: 7811.0
Subtracting 649 from 1191 leaves us with 542.
Append the next digit (5) from the dividend to 542 and continue with: 5425 / 649

Step 8:
5425 divided by 649 is 8 with a remainder of 233.
Use 8 as the next digit of our solution. 
Result so far: 78118.0
Subtract 5192 from 5425 to get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Going ahead to step 9:
2330 divided by 649 is 3 with a remainder of 383.
Record the quotient 3 as the next digit in the result. 
Result so far: 78118.3
If we take 1947 away from 2330, we end up with 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

On to step 10:
When dividing 3830 by 649, we get 5 with a remainder of 585.
Put 5 as the next digit of the answer. 
Result so far: 78118.35
The remainder is 585 after subtracting 3245 from 3830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Let's proceed to step 11:
If we divide 5850 by 649, we get 9 and a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 78118.359
The remainder is 9 after subtracting 5841 from 5850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 12:
649 goes into 90 0 times with a remainder of 90.
The next digit of our result is 0. 
Result so far: 78118.359
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 13:
When dividing 900 by 649, we get 1 with a remainder of 251.
Write down 1 as next digit of the result. 
Result so far: 78118.35901
Deduct 649 from 900 and we're left with 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

On to step 14:
If we divide 2510 by 649, we get 3 and a remainder of 563.
Use 3 as the next digit of our solution. 
Result so far: 78118.359013
Subtracting 1947 from 2510 leaves us with 563.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5630, and continue the process.

Going ahead to step 15:
649 goes into 5630 8 times with a remainder of 438.
Put 8 as the next digit of the answer. 
Result so far: 78118.3590138
The remainder is 438 after subtracting 5192 from 5630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Advancing to step 16:
When dividing 4380 by 649, we get 6 with a remainder of 486.
Use 6 as the next digit of our solution. 
Result so far: 78118.35901386
Subtracting 3894 from 4380 leaves us with 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

After the division, we end up with 78118.35901386 and a remainder of 4.86e-07.