an assistance vs a assistance

Some examples from the web:

• Look at that position a lot' of time until fortunately passes an assistance of Cagiva and I set up.
• As an assistance to see the button numbers
• Please contact our personal shopper through the form and you will receive more than an assistance!
• BredaNardi provides to the customers an assistance for the training of the crews and the head office obtained an enormous success by working out a vast series of military models not exceeding the gross weight originating.
• Dying with dignity means for the sick person to be given the right to have an assistance which is respectful of his existence, meeting all his needs, biophysical, physical, psychological and spiritual ones.
• The Secretary stated to have received guarantees from the USA government on McKinnon's suitable assistance once he will be put in prison, an assistance that includes "appropriate medical care and treatment" for his particular condition.
• The purpose was to provide customers with an assistance aimed not only to the purchase of clothes, but mainly to transmit the exclusivity of the brand and to offer a personalized approach.
• We visited an assistance center for the wounded of Quang Tri.
• The Greek debt crisis forced them to create an assistance mechanism.
• The Commission also intends to introduce an assistance and information service on questions of intellectual property for the fifth framework programme.
• Existence of an assistance and information service for people with disabilities.
• It's an assistance program I've started for public women.
• Many are trained by an assistance dog organization, or by their handler, often with the help of a professional trainer.
• To obtain this certificate, it is necessary an assistance not inferior to 90 %.
• Delivery takes five days and the package includes an assistance service we are very proud of.
• Tailored national assistance programmes carried out under an assistance roadmap
• In case you require an assistance or our opinion, please contact us by phone or send an e-mail.
• Caring about kids for "Luciano" is not only about shows, we support those who need an assistance from the adults.
• Our guests use an electronic access to the property and room behind an assistance of the hotel card system.
• On Monday 4th February the Government sent a Ministerial Team to the area for an assessment and to quickly establish an assistance mechanism.

Some examples from the web:

• So, it was I, Jacob Van Helsing, with a assistance of Sadie MacPherson,
• And a Casualty Assistance Calls Officer.
• The Mujahideen can barely function without a American assistance.
• A sympathetic assistance from a strong, rich man...
• We guarantee to you a personalized assistance and a very great flexibility in all the phases of your project of river vacancies.
• Romania is in a precautionary financial assistance programme.
• The trade provisions are complemented by a comprehensive development assistance envelope.
• All right. Gerti, a little assistance here.
• I've been thinking about starting a financial assistance fund.
• A Casualty Assistance Officer will contact you within a few hours.
• Gerti, a little assistance here.
• She did that to herself with a little assistance from you.
• It's trite, but sometimes a material assistance may help the situation.
• But in your circumstances, I can see you might need a little assistance.
• Let me get you a financial assistance package.
• And so this green dot up here is a driver assistance system.
• A Casualty Assistance Officer will contact you in four hours...
• In addition, our customers have access to a 24hr assistance service for emergencies that may arise.
• It also runs a roadside assistance service for its members.
• These challenges are being addressed through a stringent assistance and monitoring process in the pre-accession context.