641817 divided by 61 
The aim is to understand the frequency of 61 in 641817.

Advancing to step 1:
When dividing 6 by 61, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 61

Advancing to step 2:
When dividing 64 by 61, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 61 away from 64, we end up with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 61

Going ahead to step 3:
When dividing 31 by 61, we get 0 with a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 31 to get 31.
Bring next digit (8) of the dividend behind the 31 and repeat the process: 318 / 61

Advancing to step 4:
The number 61 fits into 318 5 times, leaving a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 105.0
Deduct 305 from 318 and we're left with 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 61

On to step 5:
61 can be fit into 131 2 times, resulting in a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 1052.0
Deduct 122 from 131 and we're left with 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 61

Step 6:
61 can be fit into 97 1 times, resulting in a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 10521.0
Subtracting 61 from 97 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 7:
61 goes into 360 5 times with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 10521.5
Subtracting 305 from 360 leaves us 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.

Let's proceed to step 8:
550 divided by 61 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 10521.59
If we subtract 549 from 550, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
61 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 10521.59
Deduct 0 from 10 and we're left 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.

Advancing to step 10:
The number 61 fits into 100 1 times, leaving a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 10521.5901
If we take 61 away from 100, we end up 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.

Let's proceed to step 11:
61 goes into 390 6 times with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 10521.59016
If we subtract 366 from 390, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 12:
240 divided by 61 is 3 with a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 10521.590163
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 13:
570 divided by 61 is 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 10521.5901639
Subtracting 549 from 570 leaves us 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.

Moving on to step 14:
The number 61 fits into 210 3 times, leaving a remainder of 27.
The next digit of our result is 3. 
Result so far: 10521.59016393
The remainder is 27 after subtracting 183 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

After the division, we end up with 10521.59016393 and a remainder of 2.7e-08.