Can we put a V-ing after a V-ing such as in sentence below

[trueheart_205]

Can we put a V-ing after a V-ing such as in sentence below:
"One of the least effective ways of storing information is learning repeating it"
or we must write: "learning to repeat"
Thanks a lot.

 

[5jj]

Only 'learning to repeat' is natural.

 

[trueheart_205]

So, Is there any cases we use V-ing after V-ing?
Such as 'I am trying swimming' and something like this.
Thanks.

 

[5jj]

If a particular verb can be followed only by a gerund then you can use V+ing after V+ing.

Note that 'am am trying to swim' and 'I am trying swimming' mean different things. The first may end up in drowning, the second in improved health.