We look at the division of 61409850 by 646 
The aim is to understand the frequency of 646 in 61409850.

Moving on to step 1:
When dividing 6 by 646, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 646

Let's proceed to step 2:
When dividing 61 by 646, we get 0 with a remainder of 61.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 61 to get 61.
Append the next digit (4) from the dividend to 61 and continue with: 614 / 646

Moving on to step 3:
The number 646 fits into 614 0 times, leaving a remainder of 614.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 614, we end up with 614.
Include the next digit (0) from the dividend after 614, then repeat: 6140 / 646

Step 4:
6140 divided by 646 is 9 with a remainder of 326.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 326 after subtracting 5814 from 6140.
Fetch the next digit (9) from the dividend, attach it to 326 and continue: 3269 / 646

Moving on to step 5:
When dividing 3269 by 646, we get 5 with a remainder of 39.
Write down 5 as next digit of the result. 
Result so far: 95.0
Deduct 3230 from 3269 and we're left with 39.
Include the next digit (8) from the dividend after 39, then repeat: 398 / 646

Step 6:
398 divided by 646 is 0 with a remainder of 398.
Use 0 as the next digit of our solution. 
Result so far: 950.0
Deduct 0 from 398 and we're left with 398.
Append the next digit (5) from the dividend to 398 and continue with: 3985 / 646

Let's proceed to step 7:
When dividing 3985 by 646, we get 6 with a remainder of 109.
Put 6 as the next digit of the answer. 
Result so far: 9506.0
The remainder is 109 after subtracting 3876 from 3985.
Fetch the next digit (0) from the dividend, attach it to 109 and continue: 1090 / 646

Advancing to step 8:
If we divide 1090 by 646, we get 1 and a remainder of 444.
The next digit of our result is 1. 
Result so far: 95061.0
If we take 646 away from 1090, we end up with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Let's proceed to step 9:
The number 646 fits into 4440 6 times, leaving a remainder of 564.
Put 6 as the next digit of the answer. 
Result so far: 95061.6
Subtract 3876 from 4440 to get 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Step 10:
5640 divided by 646 is 8 with a remainder of 472.
Write down 8 as next digit of the result. 
Result so far: 95061.68
If we subtract 5168 from 5640, we get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Let's proceed to step 11:
The number 646 fits into 4720 7 times, leaving a remainder of 198.
Use 7 as the next digit of our solution. 
Result so far: 95061.687
The remainder is 198 after subtracting 4522 from 4720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Moving on to step 12:
If we divide 1980 by 646, we get 3 and a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 95061.6873
If we take 1938 away from 1980, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 13:
646 goes into 420 0 times with a remainder of 420.
Put 0 as the next digit of the answer. 
Result so far: 95061.6873
If we subtract 0 from 420, we get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Step 14:
646 goes into 4200 6 times with a remainder of 324.
Write down 6 as next digit of the result. 
Result so far: 95061.687306
The remainder is 324 after subtracting 3876 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Advancing to step 15:
If we divide 3240 by 646, we get 5 and a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 95061.6873065
Deduct 3230 from 3240 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.

Step 16:
The number 646 fits into 100 0 times, leaving a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 95061.6873065
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

In conclusion, the division gives 95061.6873065 with a balance of 1e-07.