When people hear the term "trading" they sometimes relate it to frequency.

When I speak of "trading", please note that I am necessarily imply buying and selling something. Trading is defined as: the act or process of buying, selling, or exchanging.

The term "trading" is not related to the frequency of buying and selling, but instead the act of buying and selling. Only when you add a term indicating frequency does the meaning change. For example, "long term position trading" is different than "day trading" or "high frequency trading". All of those terms included the word "trading", yet none of them are the same. 

I don't actually attempt to place a predefined time frame any any position: I probably hold a winner as long as it's winning and cut a loss short no matter how recently I entered it. The time frame, frequency, and turnover isn't a factor. 

When you "invest" in something, such as a managed investment program involved in buying and selling securities (trading), you may not have a predetermined exit point. You are invested in a managed program that you expect to do the selling and buying for you. in fact, we probably wouldn't consider a program that buys and doesn't sell a "managed" program. If it just buys and then holds, there is no management and no reason to pay a management fee or consider it a "program". 

While I define "investing" as buying or selling without necessarily having a predefined exit, I believe the best "investment" decisions probably have an expected outcome and exit. 

The exit almost always determines the outcome. So, we necessarily call it "trading" when we are dealing with buying and selling exchange traded securities or other liquid exchange traded markets. 

To "manage" is to direct and control. 

Investors' invest in our managed investment program and my role is to manage the trading: the buying and selling. We call that portfolio management, which is the process of trading.