We look at the division of 61050334 by 645 
The aim is to understand the frequency of 645 in 61050334.

On to step 1:
The number 645 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 645

Advancing to step 2:
61 divided by 645 is 0 with a remainder of 61.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 61 and we're left with 61.
Grab the next digit (0) from the dividend, add it to 61, then carry on: 610 / 645

Step 3:
The number 645 fits into 610 0 times, leaving a remainder of 610.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 610, we end up with 610.
Fetch the next digit (5) from the dividend, attach it to 610 and continue: 6105 / 645

Moving on to step 4:
The number 645 fits into 6105 9 times, leaving a remainder of 300.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 5805 from 6105 and we're left with 300.
Bring next digit (0) of the dividend behind the 300 and repeat the process: 3000 / 645

Let's proceed to step 5:
645 goes into 3000 4 times with a remainder of 420.
Record the quotient 4 as the next digit in the result. 
Result so far: 94.0
Subtracting 2580 from 3000 leaves us with 420.
Fetch the next digit (3) from the dividend, attach it to 420 and continue: 4203 / 645

On to step 6:
645 goes into 4203 6 times with a remainder of 333.
Use 6 as the next digit of our solution. 
Result so far: 946.0
Subtract 3870 from 4203 to get 333.
Grab the next digit (3) from the dividend, add it to 333, then carry on: 3333 / 645

Moving on to step 7:
645 can be fit into 3333 5 times, resulting in a remainder of 108.
Write down 5 as next digit of the result. 
Result so far: 9465.0
Deduct 3225 from 3333 and we're left with 108.
Bring next digit (4) of the dividend behind the 108 and repeat the process: 1084 / 645

Advancing to step 8:
645 goes into 1084 1 times with a remainder of 439.
Use 1 as the next digit of our solution. 
Result so far: 94651.0
If we subtract 645 from 1084, we get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Moving on to step 9:
645 goes into 4390 6 times with a remainder of 520.
The number 6 becomes the next digit in our result. 
Result so far: 94651.6
Subtract 3870 from 4390 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 10:
The number 645 fits into 5200 8 times, leaving a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 94651.68
Deduct 5160 from 5200 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
The number 645 fits into 400 0 times, leaving a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 94651.68
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 12:
When dividing 4000 by 645, we get 6 with a remainder of 130.
Put 6 as the next digit of the answer. 
Result so far: 94651.6806
Subtract 3870 from 4000 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 13:
1300 divided by 645 is 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 94651.68062
Deduct 1290 from 1300 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.

On to step 14:
The number 645 fits into 100 0 times, leaving a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 94651.68062
If we subtract 0 from 100, we 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.

Going ahead to step 15:
The number 645 fits into 1000 1 times, leaving a remainder of 355.
The next digit of our result is 1. 
Result so far: 94651.6806201
The remainder is 355 after subtracting 645 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Let's proceed to step 16:
The number 645 fits into 3550 5 times, leaving a remainder of 325.
Write down 5 as next digit of the result. 
Result so far: 94651.68062015
The remainder is 325 after subtracting 3225 from 3550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Our division results in 94651.68062015 with a remaining 3.25e-07.