We look at the division of 645429 by 60 
The aim is to understand the frequency of 60 in 645429.

Let's proceed to step 1:
60 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 60

Let's proceed to step 2:
60 can be fit into 64 1 times, resulting in a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
If we take 60 away from 64, we end up with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 60

Advancing to step 3:
60 can be fit into 45 0 times, resulting in a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 45, we end up with 45.
Fetch the next digit (4) from the dividend, attach it to 45 and continue: 454 / 60

Let's proceed to step 4:
454 divided by 60 is 7 with a remainder of 34.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
Subtract 420 from 454 to get 34.
Append the next digit (2) from the dividend to 34 and continue with: 342 / 60

On to step 5:
342 divided by 60 is 5 with a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 1075.0
If we subtract 300 from 342, we get 42.
Bring next digit (9) of the dividend behind the 42 and repeat the process: 429 / 60

Going ahead to step 6:
60 goes into 429 7 times with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 10757.0
If we take 420 away from 429, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
60 can be fit into 90 1 times, resulting in a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 10757.1
The remainder is 30 after subtracting 60 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
300 divided by 60 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 10757.15
Subtracting 300 from 300 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
When dividing 0 by 60, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10757.15
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
If we divide 0 by 60, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10757.15
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 10757.15, with a leftover of 0.0.