61681913 ÷ 61 
The aim is to understand the frequency of 61 in 61681913.

Going ahead to step 1:
The number 61 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 61

Going ahead to step 2:
61 can be fit into 61 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 61 from 61 leaves us with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 61

Going ahead to step 3:
If we divide 6 by 61, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 6 to get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 61

Let's proceed to step 4:
The number 61 fits into 68 1 times, leaving a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 101.0
Deduct 61 from 68 and we're left with 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 61

Let's proceed to step 5:
61 goes into 71 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 1011.0
Deduct 61 from 71 and we're left with 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 61

On to step 6:
109 divided by 61 is 1 with a remainder of 48.
Write down 1 as next digit of the result. 
Result so far: 10111.0
Subtracting 61 from 109 leaves us with 48.
Append the next digit (1) from the dividend to 48 and continue with: 481 / 61

On to step 7:
When dividing 481 by 61, we get 7 with a remainder of 54.
The next digit of our result is 7. 
Result so far: 101117.0
If we subtract 427 from 481, we get 54.
Fetch the next digit (3) from the dividend, attach it to 54 and continue: 543 / 61

Advancing to step 8:
If we divide 543 by 61, we get 8 and a remainder of 55.
Record the quotient 8 as the next digit in the result. 
Result so far: 1011178.0
Deduct 488 from 543 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 9:
When dividing 550 by 61, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 1011178.9
Subtracting 549 from 550 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 10:
If we divide 10 by 61, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 1011178.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
100 divided by 61 is 1 with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 1011178.901
Deduct 61 from 100 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 12:
The number 61 fits into 390 6 times, leaving a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 1011178.9016
Deduct 366 from 390 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 13:
240 divided by 61 is 3 with a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 1011178.90163
If we take 183 away from 240, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 14:
61 goes into 570 9 times with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 1011178.901639
Deduct 549 from 570 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 15:
If we divide 210 by 61, we get 3 and a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 1011178.9016393
If we take 183 away from 210, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 16:
If we divide 270 by 61, we get 4 and a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 1011178.90163934
If we subtract 244 from 270, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final result is 1011178.90163934 with a remainder of 2.6e-08.